Answer: A) Extended metaphor.
Explanation: a metaphor is a figure of speech that consists in making a direct comparison between elements that aren't obviously related, in order to create an image in the reader's mind. In the given excerpt from "Hope, Despair, and Memory" by Elie Wiesel, we can see an example of an extended metaphor that compares memories with ghosts (or dead), that could not be buried (meaning that forgetting was not an option).