An Unconscious Person Is Brought to the Emergency Department by a Friend

An unconscious person is brought to the emergency department by a friend. The friend found the person in a bedroom at a college fraternity party. Semen is observed on the person's underclothes. The priority actions of staff members should focus on:

A) maintaining gas exchange.
B) preserving rape evidence.
C) obtaining a description of the rape.
D) determining what drug was ingested.