Part B:

Which detail from the text BEST supports your answer from part A?
A
"But she is just so mysterious," Mackenzie said, abandoning her peanut butter sandwich. "I wonder what it would be like to be her friend, but I am sure she has too many friends."

B
Jennifer, not listening to Mackenzie's thoughts on Amber, was instead devouring her macaroni and cheese.

C
...Mackenzie finally found her voice. "You mean you don't have a million glamorous friends?"

D
While Mackenzie assumed that Amber had many friends and was too snobby to be friends with her, Amber was, in fact, a simple and lovely person who would make a great addition to her friends.

The detail that best supports the answer from part A is option D. It shows that Mackenzie's assumption about Amber having many friends and being too snobby to be friends with her was incorrect.