By expressing that blossoms have a limitted life span
The correct answer is C. Because it is one of the few words a raven can say. The speaker, a man who grieves for his deceased love, Lenore, has been visited by a talking bird who only know one word: Nevermore. He was so depressed of having lost his love that he allows his imagination to transform the bird into a prophet bringing news that the lovers will "Nevermore" be together.
“With torn and bleeding hearts we smile”