When Comparing the Pubertal Process in Females and Males,it Is

When comparing the pubertal process in females and males,it is found that

A) girls and boys follow the same pattern of development at the same time.
B) boys begin to change about 2 years later than girls.
C) girls and boys follow significantly different patterns of development,although they occur at the same time.
D) we really cannot say anything definite given our present state of knowledge about sexual development.