If you have a conditional offer and you are taking 3 AP tests:
College A says you are in if you get a 5 on Calculus AB and a 4 on your other pending AP tests
But College B says you just need 3 fours
You Firm A, and if you get the 5/4/4 you are in, otherwise you can go to your insurance school with 4/4/4
Basically, make your insurance school and offer you know you can meet.