Every Night for Two Weeks, a Cat Hung Around Xavier's

Every night for two weeks, a cat hung around Xavier's back door.Since the cat did not seem to have a home, Xavier decided to keep it.Which of the following is most likely to be TRUE?

A) If the cat belongs to someone else, Xavier has no property rights.
B) Xavier has property rights in the cat, but only if it is not wearing any tags.
C) If the cat arrived at Xavier's house after wandering away from its owner, then Xavier has good property rights against everyone in the world except that original owner.
D) Xavier has an absolute right to possess the cat under the rule that states "finders keepers, losers weepers."
E) Xavier cannot have property rights over a living thing.