Each of the following individuals has verbally stated they would not wish to be kept alive if they were to enter a permanently vegetative state. Which of the following has the strongest legal basis for those verbal wishes to be carried out?
a. 28 year old woman with a DNR order
b. 95- year old man who created an advance directive while he was mentally competent
c. 45 year old man with a severe intellectual disability
d. 20 year old with a power of attorney