Answer: The sentence that most clearly describes diction is A. The author carefully avoids using words that are too high level.
Step-by-step explanation: Diction is a term used to refer to the style of an author. In this case, an author's style is conceived in terms of word choice. Good diction is related to a choice of words that are appropriate to the context. Therefore, the sentence that most clearly describes diction is A. "The author carefully avoids using words that are too high level" since it is the only one that makes reference to the choice of words and their appropriateness. The author avoids using words that are too high level in order for the reader to understand easily what is being presented.