Answer:
a. serve a purpose and are not easily modified.
Explanation:
In psychology, gender-role stereotypes are generalized ideas about the behaviors that we expect from men and women. In other words, it's the preconceptions we have about how men or women should behave, dress, act, etc.
These gender roles are not easily modified because they have their roots in the culture and they serve a purpose of differentiating men from women (although this might not be correct since we are talking about generalizations).
Therefore, from the options given we can say that gender-role stereotypes a. serve a purpose and are not easily modified.
