The question is incomplete and the full version can be found online.
Answer:
B. "nobody had the right to say that any longer, and I turned him out.”
Explanation:
To answer this question one must first read "Was It a Dream?" (1903), by Guy de Maupassant.
Part A of this question asks about what the interaction between the narrator and the priest in paragraph 5 reveals, and the answer is that it reveals that the priest and perhaps others were already aware that the narrator’s lover was unfaithful.
Option B is the only one that allows the reader to infer the answer to Part A because the narrator´s claim that no one has the right to call his lover a mistress any longer indicates that people used to rightfully call her that, meaning that they already knew that she was unfaithful.