Norman renteda room at Bates Motel. The motel had signs posted informing the guests that it was not liable for the loss of valuables that guests failed to deliver to the motel for safekeeping. Norman had a very expansive wedding ring that he wanted to give to his lovely girlfriend Marion. While he was in his room, he put the ring on the dresser. He realized he needed to get some ice from the machine down the hall. He left his door slightly ajar because he did not want to bring his room key. Upon his return, the ring was stolen. Which of the following is not an exception under common law to a hotelkeeper's liability? a public enemy an ordinary robber O the inherent nature of the property an act of a public authority the guest's negligence an act of God