The sentence from the passage that best supports the idea that Letty needs her brother to reassure her is B. In paragraph 4, she tells Jimmy that they will adjust and implies that he is super-anxious.
What is the sentence?
This sentence explicitly mentions Letty saying "We'll adjust," which implies she wants Jimmy to share her optimism and reassure her about their situation.
Also, the phrase "she was implying I know you're super-anxious" shows Letty's awareness of her brother's anxieties and her hope that he can overcome them for both their sakes. So, the best sentence that supports the idea that Letty needs her brother to not be anxious.
Complete Question;
Which sentence from the passage best supports the idea that Letty needs her brother to reassure her? A. “Letty would adapt with ease; she’d volunteer for about seven clubs because they'd desperately need her, and she would get to know the entire student body because she was predisposed to love everyone." (paragraph 5) B. “‘Jimmy, we’ll adjust.’ She was implying I know you’re super-anxious.” (paragraph 4) C. “I wanted to be coaxed out of my misery about relocating from the city to the country, but I was being deliberately stubborn; it was all going to be so ... unexceptional.” (paragraph 3) D. “I could tell she wanted me to comment on how the student body at our new high school would likely welcome us with open arms or how things here would be so much better than at our old school." (paragraph 1)