I don't like the way this is worded. An allegory is a short type of poem. Not a genre. But the answer is D. If you look at general poetry structure, it tells a vivid story in a confined manner.
The answers would be good and benefit because antonym means opposite, so what's the opposite of harm, well its good of course.
Answer:
Whitman 155-156
Explanation:
He talks about seeing more and more places being free