Which excerpt from "The Chrysanthemums" foreshadows Elisa's feelings of being trapped?

A. She looked toward the river road where the willow-line was still yellow with frosted leaves so that under the high grey fog they seemed a thin band of sunshine.
B. The country road ran along the dense bank of willows and cotton-woods that bordered the river.
C. On every side it sat like a lid on the mountains and made of the great valley a closed pot.
D. The thick willow scrub along the river flamed with sharp and positive yellow leaves.