In Edgar Allan Poe's "the philosophy of composition", how does Poe say the "unity of effect" is affected by the length of a poem?
A. The "unity of effect" is weaker in short poems because they can be easily forgotten.
B. The unity of effect is stronger in longer poems that have more content
C. The "unity of effect" is weaker in long poems because the symbolism gets confusing
D. The unity of effect is greater in a short poem that can be read all at once
