What Is the Difference Between a Living Will and a Letter

What is the difference between a living will and a letter of last instruction?

A) Living wills are nonlegal documents that describe an individual's wishes should they ever become incapacitated, while the letter of last instruction is a legal document that instructs survivors on dealing with financial details after an individual's death.
B) Living wills are legal documents that detail exactly how individuals would like their medical decisions handled should they become incapacitated, while a letter of last instruction is a nonlegal document that details how an individual would like his or her finances handled after death.
C) Both are legal documents that instruct family members on how an individual would like certain specifics to be handled. However, living wills express persons' wishes with regard to medical care should they become incapacitated, and a letter of last instruction discusses wishes regarding things such as funeral arrangements and access to personal financial information in the event of an individual's death.
D) Both are nonlegal documents that give instructions for family members or survivors on how an individual would like certain specifics to be handled. However, living wills express people's wishes with regard to medical care should they become incapacitated, and a letter of last instruction discusses wishes regarding things like funeral arrangements and access to personal financial information in the event of an individual's death.