Read this line from the last stanza from "A Poison Tree." When the night had veiled the pole;

What is the meaning of the figurative language in this line?
A. The night is dark because it is veiled in misty fog.
B. The darkened sky conceals the stars and the moon.
C. A veiled cloud cover makes the night very dark.
D. The dark night obscures the pole, or North star.