choose the answer that uses a parallel structure to complete the sentence. while researching for his book…

choose the answer that uses a parallel structure to complete the sentence. while researching for his book, the author traveled to europe, conducted studies, ______ a. and interviewed hundreds of experts. b. and focused on interviewing hundreds of experts. c. and will begin interviewing hundreds of experts. d. the texas highway commission initiated a broad public education campaign, which used research to determine which age groups littered most and how to encourage them to stop.

choose the answer that uses a parallel structure to complete the sentence. while researching for his book, the author traveled to europe, conducted studies, ______ a. and interviewed hundreds of experts. b. and focused on interviewing hundreds of experts. c. and will begin interviewing hundreds of experts. d. the texas highway commission initiated a broad public education campaign, which used research to determine which age groups littered most and how to encourage them to stop.

Answer

Brief Explanations:

Parallel structure requires that items in a list have the same grammatical form. In the given sentence, "traveled" (past - tense verb) and "conducted" (past - tense verb) are in the past - tense. Option A, "interviewed" (past - tense verb), maintains this parallelism. Option B has "focused" (verb) followed by a gerund phrase ("on interviewing"), which breaks the parallelism. Option C has a future - tense construction ("will begin") which is not parallel to the past - tense verbs. Option D is a completely different and unrelated sentence.

Answer:

A. and interviewed hundreds of experts.