Samantha Went on a Date with Chad, but the Next

Samantha went on a date with Chad, but the next morning realized she had no memory of much of the evening. She had only a few sips of the one drink she ordered, but her memory fades soon after. She's suspicious and fears she may be a victim of a sexual assault.

A) Samantha's date is arrested. During the trial his lawyer attempts to bring up Samantha's sexual history, but is forbidden from doing so based on:
B) a time delay.
C) rules of evidence.
D) look for incriminating DNA under her fingernails.
E) rape shield laws.