831. The study undertaken by Department of the Interior will involve examination and tagging of the California condor in order to obtain information about their daily movements, foraging habits, and sites where they nest.

(A) their daily movements, foraging habits, and sites where they nest
(B) their daily movements, foraging habits, and their nesting sites
(C) its daily movements, foraging habits, and nesting sites
(D) its daily movements, foraging habits, and about nesting sites
(E) daily movements, foraging habits, and sites in which there are nests

Solution:

Parallelism + Pronoun

In A and B, antecedent “California condor” is singular but pronoun “their” referring to it is plural and hence, A and B are incorrect.
In D, the usage of “about” second time violates parallelism-- “about their…movements,…habits, and…about …sites”. Hence, D is incorrect.
In E, the sentence structure is wordy and awkward. Hence, E is incorrect.
In C, parallelism is maintained and hence, C is the best choice.

​Sentence Correction - 1000 Questions with Solution: