Read these lines from Edgar Allan Poe's "The Raven"

“Prophet!" said I, "thing of evil! - prophet still, if bird or devil!
By that Heaven that bends above us- by that God we
both adore,
Tell this soul with sorrow laden if, within the distant
Aidenn,
It shall clasp a sainted maiden whom the angels name
Lenore-
Clasp a rare and radiant maiden whom the angels name
Lenore."
Quoth the Raven- "Nevermore.”

According to "The Philosophy of Composition" what did Poe achieve when he wrote this stanza?

[A] He wrote the ending.
[B] He figured out how to introduce the raven.
[C] He established the climax.
[D] He decided on the effect of the poem.