Final answer:
ASA Class III refers to a patient with a moderate systemic disease or disturbance that limits activity but is not life-threatening on a daily basis.
Step-by-step explanation:
The American Society of Anesthesiologists (ASA) classification system is used to indicate a patient's preoperative physical condition. The correct answer for the physical condition of a patient classified as ASA Class III is B. Moderate systemic disease or disturbance. This implies that the patient has a systemic condition that, while not life-threatening on a day-to-day basis, does limit activity and could be debilitating. Examples might include controlled diabetes with vascular complications, stable angina, or advanced kidney disease.