where did you get this from? During my last year in high school, I failed two APs out of the three I took (and yes,senioritis hit me hard. I actually scored a "1" on one of them). UCD didn't care.
The scores you receive on AP exams have no part in the admissions process or decision. They are only considered after you have been admitted to issue appropriate units to your record. The only exception is if you have used your AP exam scores to satisfy an “a-g” requirement such as scoring a 4 on the AP French exam to satisfy the “e” Language other than English requirement. Then we would need the score to verify eligibility.