Just how big a deal is cheating on college campuses?

Erg, I’m having a heated disagreement with my sister, and we need Fluther to settle it for us.
So: Cheating in college is like:
A) Smoking pot. Sure, the campus has a no drug policy, and every now and again, you hear a horror story of the kid they made an example out of, but you still can’t go more than 20 ft in any direction without smelling a joint.
B) Date rape. It’s there – a lot – but it’s also pretty underground and, for various reason, rarely prosecuted.
C) Murder. It’s rare and it’s ALWAYS a big fucking deal.

So, jellies, which one do you think it is?