Step 1: Recall the four foundational principles of medical ethics.
Step 1: The field of medical ethics is commonly guided by four main principles, famously articulated by Beauchamp and Childress.
Step 2: Define each principle and evaluate the options.
Step 2:
(A) Beneficence: The principle of acting in the best interest of the patient; to do good. This is a core principle.
(B) Patient Autonomy: The principle of respecting the patient's right to make their own decisions about their medical care. This is a core principle.
(C) Justice: The principle of fairness and equitable distribution of healthcare resources and benefits. This is a core principle.
(D) Maleficence: This means "doing harm." The ethical principle is actually Non-maleficence, which is the duty to "do no harm." So, Maleficence itself is what one must avoid; it is not a principle to follow.
Step 3: Identify the correct principles from the list.
Step 3: Beneficence (A), Patient Autonomy (B), and Justice (C) are three of the four core ethical principles. Maleficence (D) is not a principle to be followed. Therefore, A, B, and C are the correct items.