The answer to your question would be that suspense is created in the passage partly due to it being written in the third person limited point of view. That is, your answer would be C.
In the third person limited point of view, the narrator follows the thoughts and feelings of only one character. One character is closely followed throughout the story, and it is typically the main character. In this case, the narrator only follows Rainsford, someone else is seeing and narrating how he feels and that is what builds up the suspense.
