A client who fell and broke his hip while being assisted to the bathroom by a nurse states he plans to sue the nurse. The nurse should know that, in a legal proceeding, the standard that will be used to determine if the nurse was negligent is which of the following?

The client's attorney states that injury to the client could have been prevented.

The client's provider testifies the nurse was at fault for the injury.

Another staff nurse provides testimony about how a reasonable, prudent nurse would have handled the situation.

An expert nurse provides testimony that the nurse should have handled the situation differently.