Read the excerpt from “The Monkey's Paw.”
Mr. White dropped his wife's hand, and rising to his feet, gazed with a look of horror at his visitor. His dry lips shaped the words, "How much?"
"Two hundred pounds," was the answer.
Unconscious of his wife's shriek, the old man smiled faintly, put out his hands like a sightless man, and dropped, a senseless heap, to the floor.

Which word helps reveal the mood of horror in the excerpt?

A. gazed
B. shaped
C. faintly
D. shriek