A. Fixing errors
They should've already found the main idea when writing so d is wrong
He wants to prove to everyone that he's not scared of anything.
It is apparently D, because at this point travelling years on the ocean hasn't made Odysseus hasty enough to want to return to his wife and child, and so he is now risking the lives of him and his crew for no reason other than the high of a con. Odysseus is kind of a dork, not gonna lie. His wife has to put up with a ton of manipulative people people vying for her hand in marriage and trying to kill her son, and he takes a leisurely route across the ocean meeting beautiful women and fighting gods.
The echoing sound of his voice shows his excitement that his brother is communicating
