Grace's Cousin Was Kept on Life Support for Three Years

Grace's cousin was kept on life support for three years after a car accident left him brain-dead while his wife and parents argued and fought in court over whether or not to take him off life support. Grace wants to prevent this same thing from happening to her or her husband. Because of this, Grace has created a living will that lays out in very specific language what they would like to happen should either her or her husband suffer brain death. Has Grace made the correct decision?

A) Yes, a living will can legally bind her family and doctors to follow her instructions should she become incapacitated.
B) Yes, by drafting a very specific living will, Grace has made sure that she will have her wishes met in the event of brain death.
C) No, Grace also needs to draft a durable power of attorney wherein she names a specific member of her family to carry out the wishes she outlined in her living will.
D) No, Grace also needs to draft a letter of last instruction or there will be no legal requirement for anyone to follow the instructions in her living will.