April Has Refereed High School and Women's College Soccer for 10

April has refereed high school and women's college soccer for 10 years. She is fit, knows the rules without question, and has always received excellent evaluations. When she applies to referee men's college games, the men's college referee administrator tells her that he can't use her because women won't get the players' respect and because the game looks more serious and acceptable with men refereeing. April is the victim of:

A) disparate treatment discrimination.
B) mixed motives discrimination.
C) disparate impact discrimination.
D) pretextual discrimination.