What Statement Describes a Living Will

What statement describes a living will?

A) A written and legally witnessed document that requests no extraordinary measures be taken to save a person's life in the event of terminal illness.
B) A written and legally witnessed document that directs the physician to be the client's decision maker in the event of terminal illness.
C) A written document that a client names another person to make healthcare decisions in case the client becomes unable to do so.
D) Verbal communication that directs the physician to be the client's decision maker in the event of terminal illness.