Which of the following is a CORRECT statement of the United States Supreme Court's position on a patient's right to refuse life-saving nutrition and hydration. (a) There is a legal distinction between artificially supplied nutrition and hydration and other forms of medical treatment, and States may restrict the patients' right to remove nutrition and hydration. (b) There is a legal distinction between artificially supplied nutrition and hydration and other forms of medical treatment and a patient has a constitutional right to refuse to accept or refuse nutrition or hydration, however this right cannot be exercised by a surrogate or proxy acting for the person. (c) The United States Constitution grants a competent person a constitutionally protected right to refuse or accept nutrition or hydration. (d) The patient's right to accept or remove life-saving nutrition and hydration is governed solely by state statutes dealing with healthcare decision-making