Final answer:
Joseph secretly returned the money to his brothers by placing it back into their sacks. This act is part of the story in the Biblical book of Genesis.
Step-by-step explanation:
The question asks what Joseph did with the money he got from his brothers for the grain. The correct answer, based on the Biblical account found in Genesis, is that Joseph returns the money to his brothers by secretly placing the money back into their sacks of grain. This causes some consternation when the brothers find the money upon returning to their father's house, fearful of being accused of theft. The passage you referenced doesn't directly pertain to the Biblical story, but it seems to reflect on the moral considerations regarding money and social differences.