If you had shared the options It would have been much easier for me to answer in suitable form for you. But actually I have got the answer and do hope it could help you. I am more than sure that the repetition of "nevermore" creates a unity of effect on longing. The only word that Rave knows and uses all the time to respond is "nevermore" so that it gives a circular sense to the poem.
Answer: I can't really give you an answer because I don't know your dream. But I'd say the TYPICAL American dream is to get a stable, good paying job, marry the person you love, have two kids, and live in a big nice house. The obstacles you would have to overcome are possibly school fees, working and getting along with people, raising your kids right. I'm not sure about the thesis and supporting details because like I said, not my dream. It's yours.
Modifies a noun or pronoun
It is an opinion rather than a fact because there is no data to support that all service members and veterans have challenges when they return. There are no factual statistics or data to back up this claim so therefore it is an opinion