"to illustrate the close friendship between the men."
What Katie is worried about at the beginning of The Shakespeare Mix-Up is the speech she has to give tomorrow.
She is learning some facts about Shakespeare and is frightened about what her speech is going to look like the following day. She says to her mom that it is a very important speech and that her school career depends on it.
The answer to this question is possibly: B. To show that the narrator is trying to be smarter. Looking back at the sentence, I can use context clues. I can specifically look at where the sentence said, "Something inside me began to die." That is suggesting that the narrator is influenced by her mother's face to allow something to die within her. In other words, she realizes that she needs to change into a new, better person. Hope that helps.