870. To maintain a high demand for their product, the manufacturers first took over the marketing and sales functions previously performed by outside agents; next, they began changing their advertising campaigns monthly to keep pace with the rapid changes in consumers’ lives.

(A) they began changing
(B) this began changing
(C) the former began changing
(D) to begin changing
(E) to change

Solution:

Parallelism

In A, parallelism is maintained through “To maintain…, the manufactures first took...; next, they began changing…to keep…”
Semi-colon correctly joins two independent clauses.
In the first Independent clause, “the manufacturers” is at the subject position doing the action of “taking over”. This sentence uses semicolon which means it should be followed by another independent clause. In this second independent clause, “they” is at the same place as “the manufacturers” is, that is at the subject’s place. Hence, “they” grammatically refers to “the manufacturers”.
“they” “first” did something and “next” only “they” could take another step. Hence, logically “they” refers to “the manufacturers”.
Therefore, A is the best choice.

In B, there is no referent to “this” and hence, B is incorrect.
In C, “the former....their” is awkward and hence, C is incorrect.
In D and E, “to begin…” and “to change…”, respectively, prevent the second clause from becoming independent. A semi-colon always connects two independent clauses. Hence, D and E are incorrect choices.

Sentence Correction - 1000 Questions with Solution:
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with solution SC- 490/1000 with solution SC- 491/1000 with solution SC- 492/1000 with solution SC- 493/1000 with solution SC- 494/1000 with solutionSC- 495/1000 with solution SC- 496/1000 with solution SC- 497/1000 with solution SC- 498/1000 with solution SC- 499/1000 with solution SC- 500/1000 with solutionSC- 501/1000 with solution SC- 502/1000 with solution SC- 503/1000 with solution SC- 504/1000 with solution SC- 505/1000 with solution SC- 506/1000 with solutionSC- 507/1000 with solution SC- 508/1000 with solution SC- 509/1000 with solution SC- 510/1000 with solution SC- 511/1000 with solution SC- 512/1000 with solutionSC- 513/1000 with solution SC- 514/1000 with solution SC- 515/1000 with solution SC- 516/1000 with solution SC- 517/1000 with solution SC- 518/1000 with solutionSC- 519/1000 with solution SC- 520/1000 with solution SC- 521/1000 with solution SC- 522/1000 with solution SC- 523/1000 with solution SC- 524/1000 with solutionSC- 525/1000 with solution SC- 526/1000 with 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solution SC- 601/1000 with solution SC- 602/1000 with solutionSC- 603/1000 with solution SC- 604/1000 with solution SC- 605/1000 with solution SC- 606/1000 with solution SC- 607/1000 with solution SC- 608/1000 with solutionSC- 609/1000 with solution SC- 610/1000 with solution SC- 611/1000 with solution SC- 612/1000 with solution SC- 613/1000 with solution SC- 614/1000 with solutionSC- 615/1000 with solution SC- 616/1000 with solution SC- 617/1000 with solution SC- 618/1000 with solution SC- 619/1000 with solution SC- 620/1000 with solutionSC- 621/1000 with solution SC- 622/1000 with solution SC- 623/1000 with solution SC- 624/1000 with solution SC- 625/1000 with solution SC- 626/1000 with solutionSC- 627/1000 with solution SC- 628/1000 with solution SC- 629/1000 with solution SC- 630/1000 with solution SC- 631/1000 with solution SC- 632/1000 with solutionSC- 633/1000 with solution SC- 634/1000 with solution SC- 635/1000 with solution SC- 636/1000 with solution SC- 637/1000 with 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with solution SC- 898/1000 with solution SC- 899/1000 with solution SC- 900/1000 with solution SC- 901/1000 with solution SC- 902/1000 with solutionSC- 903/1000 with solution SC- 904/1000 with solution SC- 905/1000 with solution SC- 906/1000 with solution SC- 907/1000 with solution SC- 908/1000 with solutionSC- 909/1000 with solution SC- 910/1000 with solution SC- 911/1000 with solution SC- 912/1000 with solution SC- 913/1000 with solution SC- 914/1000 with solutionSC- 915/1000 with solution SC- 916/1000 with solution SC- 917/1000 with solution SC- 918/1000 with solution SC- 919/1000 with solution SC- 920/1000 with solutionSC- 921/1000 with solution SC- 922/1000 with solution SC- 923/1000 with solution SC- 924/1000 with solution SC- 925/1000 with solution SC- 926/1000 with solutionSC- 927/1000 with solution SC- 928/1000 with solution SC- 929/1000 with solution SC- 930/1000 with solution SC- 931/1000 with solution SC- 932/1000 with solutionSC- 933/1000 with solution SC- 934/1000 with 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