Which Statement Best Describes the Majority of Sexual Assaults on College

Which statement best describes the majority of sexual assaults on college and university campuses? 

A)  The victim knows the attacker and reports the attack to campus authorities. 
B)  The victim knows the attacker and does not report the attack. 
C)  The victim does not know the attacker and reports it to a friend or family member. 
D)  The victim does not know the attacker and does not report the attack.