The Textbook States All of the Following to Explain Why

The textbook states all of the following to explain why the development of intimacy is especially important in adolescence, except:

A) truly intimate relationships do not emerge until adolescence.
B) the nature of the adolescent's social world changes, with increasing importance of both same sex and other-sex peers.
C) growth of social cognition reflects more sophisticated conceptions of social relationships.
D) friendships transform being self-conscious to being more activity oriented.