Answer:
The detail that supports the idea that Elizabeth aims to show Darcy that she is just as levelheaded is:
C. “Yet she tried to the utmost to speak with composure”
Step-by-step explanation:
This question refers to the moment in "Pride and Prejudice" when Mr. Darcy proposes to Elizabeth. Darcy, although having a good heart, is quite a conceited man. He is sure Elizabeth will feel thrilled about having him propose to her. But, to his surprise, Elizabeth refuses his hand. However, she makes a great deal of effort to treat him with politeness. She wants to show him she is levelheaded, even though some of the things he said while proposing were a bit offensive to her and her family. The detail that supports this idea is "Yet she tried to the utmost to speak with composure."