I would say your okay even if you do get a b, think about it this way, a C on an AP class is like an A in an honors class, seems like your gonna be okay as long as you score alright on sats and acts, and by the looks of it, youll be fine.
Keep in mind that AP classes are college level classes... having those classes on your transcript will already impress the college people. But unfortunately, I can't really tell you if it'll impact your chances GREATLY. It just depends on the college.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.