Which Finding Is NOT Consistent with Social Identity Theory

Which finding is NOT consistent with social identity theory?

A) Girls are more likely to engage in masculine-stereotyped behaviour than boys are to engage in feminine-stereotyped behaviour.
B) Gender-typing pressures are more rigid for girls than for boys.
C) Masculine-stereotyped characteristics are valued more highly than feminine-stereotyped characteristics.
D) Boys are more likely than girls to maintain group boundaries.