Trent is reading these lines from "Winter-Time" by Robert Louis Stevenson. Black are my steps on silver sod;
Thick blows my frosty breath abroad

Which fact would best help Trent understand this poem’s meaning?

A Sod is another name for grass, and it often looks silvery-white in the winter.
B People often wear black shoes and warm gloves in the winter.
C Many animals migrate to warmer climates during the winter.
D During the winter, the clouds are very thick and look silver in the sky.