I think it is A) realizes the full impact the loss of the woman has on his life since it mostly talking in past tense. I hope this helps
Answer:
Why is the Sky Tree important to the people in Sky Land? It provides them with shade. It provides food for them.
I'd say D because I think I remember that being a big part of citing works. A could be correct too. I'd look up maybe basic MLA rules and see which ones comes up first. It kinda depends on what your teach emphasizes. Though I'm pretty confident it isn't B or C