What sense did edgar allan poe believe the "unity of effect" in a poem should arouse in the reader

A. sense of beauty

Edgar Allan Poe discusses the "unity of effect" in his essay The Philosophy of Composition. In it, he argues that the writer should decide what the dominant effect of his text will be, and he should then ensure that all the elements of the story are contributing to the development of that effect. The development and delivery of this effect is the purpose of your text.

not everyone is always right.

the answer to "what does the narrator realize by the end of the story" is b.