A nurse is caring for a client who has named a person to serve as his health care proxy. The client states he needs clarification about this type of advance directive. Which of the following statements by the client indicates a need for clarification?

The health care proxy does not go into effect until I am incapable of making decisions.

I have to choose a family member as my health proxy.

I can change who I designate as my health care proxy at any time.

If I become incapacitated, end-of-life choices will be made by my proxy.