People Tend to Evaluate Female Leaders Slightly Less Favourably Than

People tend to evaluate female leaders slightly less favourably than male leaders because:

A) people don't have many examples of women in leadership roles.
B) women aren't as skilled at leading people.
C) women tend to use one leadership style whereas effective leaders use many styles.
D) they tend to rely on gender stereotypes and prototypes of leaders.
E) of all these reasons.