Final answer:
Nurses represent the largest category of health care workers, exceeding the numbers of Respiratory Therapists, Radiographers, and Physicians.
Step-by-step explanation:
The largest category of health care workers is Nurses (Option A). Nurses represent the most significant proportion of professionals in the healthcare sector. The demand for nursing and other healthcare professionals is growing, particularly due to an aging population that requires more healthcare services.
Respiratory Therapists, Radiographers, and Physicians also represent essential roles within healthcare, but they do not outnumber the nursing workforce. Nurses play a vital role not only in patient care but also in the overall healthcare delivery system, contributing to various settings such as hospitals, clinics, and community health environments.