Why did the author have the narrator positioned far away from his loves grave when the corspses emerged?

I believe this question derives from "Was it a Dream?" by Guy de Maupassant. This is a multiple choice question with four options.

(A. To suggest that all human beings have surprising character flaws

(B. To build tension for the narrator's most important discovery

(C. To emphasize the difference between most people and the narrator's beloved

(D. To distract the reader from the main surprise of the story

The correct answer to this question is : B. To build tension for the narrator's most important discovery.

(I completed this and got it correct).

Do you have any context for the question?