Question

If they be two, they are two so
As stiff twin compasses are two:
Thy soul, the fixed foot, makes no show
To move, but doth, if the other do.

In this excerpt from "A Valediction: Forbidding Mourning," what does the narrator introduce?

A. The poem's conceit
B. The poem's rhyme scheme
C. Clichés
D. The poem's metrical pattern