Based on Chapters 2 and 3 of A Wrinkle in Time, what is the best description of Calvin O'Keefe?

A He is a trouble-maker who must learn to be less selfish.
B He is a sad young man who has trouble trusting other people.
C He is a kind, friendly boy who quickly feels comfortable with the Murrys.
D He is an athlete who cares more about sports than anything else in the world.