Alfred Owns a Bed and Breakfast Called Al's Quaint B&B

Alfred owns a bed and breakfast called Al's Quaint B&B in Somewhere,Maine.Rita Ritz has decided to stay at Al's for a week.She displays her wealth by wearing a four-carat diamond ring,a ruby necklace and bracelet,and a Versace purse.Al's has never had any reports of thefts in the 26 years he's operated his bed and breakfast.In the event of a theft,which of the following can Al do in order to limit his liability for the loss from the theft?

A) He must provide a safe for his guests valuables.
B) He must make the safe available for his guests.
C) He must post a sign of his limit of liability notifying his guests of the same.
D) All of these are correct.
E) None of these are correct.