Which of these statements is(are) true regarding a living will? 1. The document is revocable while the maker is competent. II. A living will is a statement of the maker's desires regarding hydration, respiration, and nutrition under certain medical conditions. III. A living will is a statement of the maker's faith in another person to make medical decisions for the maker when the maker is incompetent. IV. Witnesses to a living will should not be heirs or beneficiaries of the maker. A) I and lI B) I, II, and IV C) Ill and IV D) I and