536. None of the attempts to specify the causes of crime explains why most of the people exposed to the alleged causes do not commit crimes and, conversely, why so many of those not so exposed have.

(A) have
(B) has
(C) shall
(D) do
(E) could

Solution:

OG Solution: Grammatical construction + Parallelism

The sentence compares one group of the people, most of the people exposed to the alleged causes, with another group of people, so many of those not so exposed. To maintain the comparison, the verb in the second part should match the verb in the first part. Since the first verb is do not commit, the second verb should be the parallel do. There is no need to repeat commit crimes since it is understood in this construction.

(A) Verb should be do, not have
(B) Verb should be do not has
(C) Verb should be do, not shall
(D) Correct. This sentence correctly uses the verb do to complete the comparison and maintain the parallelism with do not commit
(E) Verb should be do, not could

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