The Requirement That Complained of Behavior Be Severe and Pervasive

The requirement that complained of behavior be severe and pervasive in order for it to amount to actionable sexual harassment,means

A) it must be more than occasional or it must be very serious in degree.
B) it must cause severe psychological harm to the victim.
C) that it be part of a protracted and determined campaign of harassment.
D) that it involve physical,as well as emotional,abuse.