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

Question 11 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 efficient? All of these splits are efficient. Hippo gets the big bedroom; Lion gets the medium bedroom; Possum gets the small bedroom. None of these splits are efficient. Hippo gets the medium bedroom; Lion gets the small bedroom; Possum gets the big bedroom. Hippo gets the small bedroom; Lion gets the big bedroom; Possum gets the medium bedroom