A 75 year-old client who has experienced many chronic illnes…

A 75 yeаr-оld client whо hаs experienced mаny chrоnic illnesses refuses further life-sustaining interventions including artificial nutrition and hydration. The client is competent, understands the consequences of their actions and persists in refusing treatment. An ethics consult has been placed as both the client's children and health care provider do not agree with the client's decision. Who is the appropriate decision maker in this situation?