I personally am upset because, as a human, I'm never entirely satisfied with what I have, or at least not for a long period of time. I will always yearn for the things I don't have or can't experience. But looking at what I do have and how much worse things used to be, or can be, helps take everything into perspective.
Explanation:
This response is based off of my personal experience in life
The answer may be A, if not it will be D. I hope this helped! (: If you ever need help in English, Biology, Veterinary Science, (which are my best subjects), you can always come to me. (:
