The woman whose breast I sucked is gone to the ... - JAMB Literature 2021 Question

Option D is the correct answer.

A euphemism is a mild or indirect word or expression used in place of one considered to be too harsh or blunt when referring to something unpleasant or embarrassing. It is often used to avoid offense or to make something less negative.

Here, the writer used indirect words to refer to something to unpleasant which is refer as euphemism.