The Contributing Role of Hormones to Gender Differences and Gender

The contributing role of hormones to gender differences and gender typing is shown by:

A) research showing that monkeys given hormones changed their social behavior patterns
B) research showing that children exposed prenatally to elevated levels of hormones behaved in ways consistent with their hormonal exposure
C) research showing that boys born without a penis behaved like boys even though their parents believed they were girls
D) all of the above