Either none of them are wholly correct or some of them are wholly correct, in which case there are a lot of christians headed for their hell, whatever that is.
I think it was the Moravians who kept to the slogan, "In essentials, unity, in non-essentials, diversity, in all things, charity."
If we can agree on what the essentials are, then diversity in the non-essentials is not a big deal. I don't believe someone is going to hell because they believe that God responds differently to prayer than I think he does.
The problem (one of them) with Christianity today is that it's become more and more about cognitive consent to a creed or other statement of belief than it has about personal relationship which is the calling that scripture is saturated with. But don't ask me, I'm from a holiness strand of the church. Be Christians, not just be like the world and say you "believe" in God. I think it's James (could be wrong, too short on time to look) that says "You believe in one God, good, even the demons believe that and shudder."
It really doesn't matter how/why you believe God responds to prayer. In the long run, he'll respond/not respond not based on your beliefs but on his character.
I'll get off my soapbox now.....