Which task are you most likely to do during the first pass of proofreading? check for grammatical errors. look for typographical mistakes. imagine how the audience will respond. check for problems with the writing style. look for issues with language mechanics.

A - check for grammatical errors

D - look for issues with language mechanics

Explanation:

Options a and d are related (grammatical errors and languge mechanics) and during the first pass of proof reading (typically read aloud), those are the first things that jump out at the reader.

Imagining how the audience will respond and typographical errors will come in later passes.

quite an interesting way to teach topic sentences, because the answer to this question is the best definition of a topic sentence that one can present, it is as if answering the questions taught you how to do it, this is some real teaching, it is terribly well-done.

the topic sentence in this paragraph is:

topic sentences writers stay on track and keep a paragraph from becoming an aimless collection of sentences about an idea.

which incidentally tells you what a topic sentence should be.