Suppose a Hurricane Is Going to Hit South Florida; There

Suppose a hurricane is going to hit South Florida; there are two days to prepare for it and the owner of a house is on a raft trip in Brazil and cannot be reached. The next door neighbors spend $800 on plywood and other materials to protect the house from the hurricane. Legally, this expenditure is likely to be:

A) is a gift from the neighbors, nothing more
B) is the responsibility of the homeowner; there is an agency by estoppel
C) is the responsibility of the homeowner; there is implied ratification of the agency
D) is the responsibility of the homeowner; there is agency by operation of law
E) none of the other choices