Help with Sentence Correction Grammar

Test Preparation SAT Preparation
1

<p>Five Years in the writing (A), her new book is both a response (B) to her critics' mistrust with (C) her earlier findings and an elaboration (D) of her original thesis.</p>

<p>I chose A, because "in the writing" doesn't seem like the proper idiom. Shouldn't it be "in the making"?</p>

<p>The correct answer is C, and I don't understand what's wrong with that either. Should it be "of"?</p>

2

<p>it should be mistrust of because it is an action being done.</p>

<p>the writing has no error.</p>