Your 90-year-old home care client designated her son to make decisions regarding her medical care when she is no longer able to do so. As she nears the end of her life, her son is consulted on an ever-increasing basis. What is the name of the legal instrument that activates her son's decision-making designation?

a) Power of attorney

b) Designated signer

c) Living will

d) Durable power of attorney

Answer: - d) Durable power of attorney

Explanation:-

Durable power of attorney is defined as document which allows principle for designating other person to act on behalf of principal legally. This permission is given in the situation where principal is no longer in state of making decision due to inability, disability, illness etc or other reasons.

According to the question, son's designation for making decision for her mother is allowed through durable power of attorney so that he can act on behalf of old home client.

Other option are incorrect because power of attorney, living will and designated signature person is not the legal factor for opening son's designation on making decision. Thus, the correct option is option (d).