They both describe thriller. They both have suspense and the reader wants to keep reading, to see what happens next.
A because it Is plural and I hope that helps you ☺
C-The tug-of-war between Sam’s true calling and his desire to please creates tension
It seems that you have missed the necessary details in order for us to answer this question. But as I searched for it, I also found the right answer. So based on the given passage, this implies that the author believes that the two religions can coexist but can never be philosophically reconciled. Hope this answer helps.
