There is the "counting-room," a long, low, brick building, and opposite is the "store-house," built of the same material, after the same model. Between them, swings the ponderous gate that shuts the mills in from the world without.

In referring to the "ponderous gate" the writer uses:
A. epithet.
B. simile.
C. metaphor.
D. parallelism.
E. allegory