After receiving Hermes's Sight on Saria, go to Callas (outside the cave. Talk to Callas, then return to Agrios (in the village). You'll be asked to match three choices in order to convince him to take down the body. Pick a different god's response after the first dialogue choice (e.g. choose Hermes and pick Ares's option "He belongs in Tartarus") and Agrios will refuse to take the body down -- and that's just what you want him to do. Continue to make the wrong choices and you'll build dialogue choices for all the gods. These options satisfy the gods' dialogue quotas. This is an easy way to get Apollo's 75 choice deed.