So I was accepted into UC Riverside, but I'm really nervous that I might get rescinded because of the possible D I might receive second semester in Multivariable Calculus Honors. I was able to pull off a C first semester, but I'm not 100% sure I'll be able to do the same this semester. All my other AP classes are fine, and my cumulative GPA has only dropped .1 [to a 3.7]. I emailed Riverside's admission explaining my current situation, but is there a high chance that I may be rescinded? And would it be better to call the admissions office rather than wait for an email back?