​stephanie meets sam at a rave. as they are talking, sam put a drug into stephanie's drink as she turns her head to talk to a friend. when she wakes up the next morning, she finds herself in bed with sam and learns that he had raped her the night before, although she has no memory of the assault. it is most likely that the drug sam put into stephanie's drink was ____.
a. ​mdma
b. ​lsd
c. ​rohypnol
d. ​ecstasy