Dropping Precalculus senior year second semester

I am taking both precalculus on AP statistics in my senior year. I am also taking 3 other rAP classes and am struggling severely in precalculus which has taken a toll on the rest of my grades. I am probably going to end the semester with a C in precalc soi am wondering whether I drop the class second semester ad takes another elective that will benefit me more in my major of choice. I have applied to international relations major in college. I am applying to mostly Canadian universities such as UBC, U of T, U Calgary, McMaster. I am also applying to the University of Washington and UC Santa Barbara.
Thanks

Inform the universities you are applying to so that they can account for that in the admission decision.

If you are admitted but did not inform them of the schedule change, surprising the school with your final high school transcript risks rescission.