I believe it would be A. Titles are usually italicized.
Explanation:
their: meaning a person or their possession
there: meaning a place
they're: Meaning (they are) mixed together to meaning someone doing a action or describing someone.
I would say b or c. Tbh if it was me answering I would go with c. Hope this helps!!
Assuming that you're talking about the myth of Greek Gods, the purpose of the myth is for an Explanation of natural Phenomena. For example if sailors in that era were trapped in a massive storm in the middle of the sea, they will say something like : "we've angered the Poseidon"
The two teams will debate on who won the game.
Hope this helps you!