So as the title suggests, I’m afraid that Wellesley will revoke my acceptance. My AP Computer Science grade dropped from an A to a C (high 70s - low 80s) from first to second semester. All of my other grades are fine. Will this get me a retraction from Wellesley? Does Wellesley hand out a lot of retractions in general? Please help 
The noun that corresponds to “rescind” is “rescission,” but I appreciate you not saying “rescindment.”
The general rule is no Ds, Fs, or felonies. A C that has no hope of falling to a D shouldn’t be a problem.
I agree that you don’t need to worry. I am curious, is this just senioritis, or is AP Comp Sci just not a good fit for you?