Answer:
A.iambic: ˘ '
Step-by-step explanation:
Although it starts with a trochee (with is basically a reverse Iamb, having a stressed syllable first), the rest of the poem follows the iambic form, starting with an unstressed syllable and then alternating.
Poe didn't really follow any pre-conceived structure when writing the poem. This was considered by many "part of his genius"