Answer:
C. A white blanket covered the streets.
Step-by-step explanation:
A metaphor is a figure of speech in which one relates two objects that would otherwise not be associated, by means of a direct comparison in which the meaning of the thing compared acquires a deeper and figurative sense.
In the answer above, the metaphor is established between a white blanket that covers the streets with what, one can surmise, would be snow falling on the ground.