I'm very confused about this question. Please help me! Thanks!

Question 12 5 pts Hippo, Lion, and Possum must decide how to split up the three bedrooms (big, medium, and small) in the house that they are renting. Hippo values the big bedroom at $700, the medium bedroom at $200, and the small bedroom at $100. Lion values the big bedroom at $500, the medium bedroom at $300, and the small bedroom at $100. Possum values the big bedroom at $300, the medium bedroom at $200, and the small bedroom at $100. The bedrooms are indivisible. No animal can use more than one bedroom. (That is, the marginal value of a second or third bedroom is $0.) Which of the following splits is envy-free? O Hippo gets the small bedroom; Lion gets the big bedroom; Possum gets' the medium bedroom. None of these spilts are envy-free. O Hippo gets the big bedroom; Lion gets the medium bedroom; Possum gets the small bedroom. O Hippo gets the medium bedroom; Lion gets the small bedroom; Possum gets the big bedroom. All of these splits are envy-free