The first one! Hades allows Orpheus to keep the gift of music his greatest love
I think that it is c just because it seems to fit the sentence
If you do not have future goals you will not have something to work twards. Inadvertently people are always making goals like finishing homework before watching tv, but specific knowledge biased goals help you achieve things for the long term.
The answer is A. Hope this helps and have a nice day! ;)