By neither, but a personal relationship with Jesus Christ. Denominations are not 'Christian', some of the individuals within them are.
Like I said, by grace....
My point is that humans cannot ever perfectly interpret the will of God, and so many disagree with your statement. Humans recorded Genesis. They were flawed humans. Genesis has only two chapters on creation. There's just a bit more to the story to be discovered, and science is working on its discovery.