They should be allowed, but if they do, they have to prepare for people not wanting to buy it in stores.
Answer:
They help readers know when to pause or slow down their reading.
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.
The answer is D: to show that ethers are many
I'm pretty sure the answer is D, that is the only conflict that is internal (with emotions) and not external (with other people/society)