An epilogue is a section or speech at the end of a book or play that serves as a comment on or a conclusion to what has happened. For example, "the meaning of the book's title is revealed in the epilogue". Hence, Option A is correct. Among the rest of the options, monologue means a long speech by one actor in a play or film, or as part of a theatrical or broadcast programme, duologue means a play or part of a play with speaking roles for only two actors, prologue means a separate introductory section of a literary, dramatic, or musical work. These options do not express this meaning, hence incorrect.