Need some help regarding an Ex. I trust your advice...

So, I'm going to visit a bunch of old college friends this weekend. I dated a chick while in school, but broke up with hear when I graduated (earlier this year). We tried the "friends" thing, but it didn't work, and I finally have gone a month without hearing from her. My dilemma is, do I:

A - Not call when Im there, and risk a SUPER awkward run-in (she's still friends with my friends)

B - Call, and say I'm not trying to chill, and risk being backed into a some awkward late night sex and/or breakfast or something

C - Call/text drunk late night and get some sex before I leave

I'm at a loss here reddit, and could use some input, and thoughts on pros/cons.