Answer:
a. because of the sounds of the o and the r.
Step-by-step explanation:
In "The Philosophy of Composition," Poe talks about the way in which he was able to create his poem "Nevermore." Poe talks about the way in which he developed the famous refrain, and he says that he first decided to have a very short refrain in order to make it easily applicable throughout the poem. He then tells us that the word itself was chosen because of the sounds it contains. Poe considered "o" to be the "most sonorous vowel," and "r" to be the "most producible consonant." This eventually led him to the use of the word "nevermore."