Does Joe's Sports Bar have to warn its customers about slippery floors if they allow customers to drop peanut shells on the floor from the free peanuts Joe's gives customers?

a$)$ Yes, owners must warn of all dangers.

b$)$ Probably not if this is an obvious risk, however, some cases suggest there is a duty to keep the premise safe.

c$)$ Yes, peanut shells are obviously slippery.

d$)$ No$,$ owners don't have a duty to customers drinking.