In Terms of the Forms of Christianity, What Does the Author

In terms of the forms of Christianity, what does the author think is the trend in America?

A) He thinks that Evangelical and Pentecostal Christianity will become even more dominant
B) He thinks Evangelical and Pentecostal Christianity will hold its own with mainstream Protestant Christianity
C) He thinks Evangelical and Pentecostal Christianity will continue to suffer setbacks in numbers and influence
D) He believes American Christianity is so fluid that it is impossible to imagine future forms