On page 323, it showed that Ares wasn't sure of the answers that Percy was asking him. Ares is a god of war, so everything he does, he does in full confidence, however in this case he struggles to answer the question.
<span>D.) “Mr. Lee, your presentation was both informative and enjoyable"</span>
Know, because know is present tense as is the rest of the sentence.
The answer is D.color contrasts with the text you are reading