11. Sam went to E-Z Shop to pick up some groceries. Sam was in a bit of a hurry and began walking swiftly down the aisles of the store. Sam forgot about a nagging knee injury that often reemerged when he moved too quickly. Sure enough, as Sam was briskly walking down aisle 9, where a store employee had neglected to clean up a spill, Sam's trick knee went out, and he fell to the floor just before he reached the spill. If E-Z Shop avoids liability in this case, it will probably be because

A. the store didn't owe a duty to Sam.

B. the store didn't breach any duty it owed to Sam.

C. Sam didn't suffer any legally recognizable injury.

D. the store's breach of duty didn't cause Sam's injury.