Mariam's Supervisor Embarrasses Her by Constantly Telling Sexual Jokes and by Making

Mariam's supervisor embarrasses her by constantly telling sexual jokes and by making sexual comments. Mariam was shocked when she observed that he had sexually explicit material on his computer screen during working hours. Although the supervisor has never directly approached Mariam in a physical way, she feels threatened and is so uncomfortable that it is difficult for her to do her job.
-What is one basic problem in this situation?

A) There is an unequal power relationship between Mariam and her supervisor.
B) Mariam's clothes are probably too suggestive.
C) Mariam's perception is probably very different from her supervisor's.
D) It's not clearly sexual harassment since he has not physically approached her.
E) It is very ambiguous as to who is at fault.