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 stronger in longer poems that have more content.
b. the "unity of effect" is greater in a short poem that can be read all at once.
c. the "unity of effect" is weaker in long poems because the symbolism gets confusing.
d. the "unity of effect" is weaker in short poems because they can be easily forgotten.