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.
Answer:
Hello xxx Library, I would like to know about the summer volunteer program. If you could please get back to me with more information. Also, I would like to know when the date is to apply. If you wouldn't mind telling me. Thank you!
Um...C? That's a weird question...
Increasing or increased in quality, degree, or force by successive additions.