Which of the following BEST defines the "nature of the presenting problem"?

a. Determining the status of an organ by pressing or gently pushing with the fingertips, fingers, or palm of hand
b. The physical structure of the human body
c. The physician's clinical identification of the severity of and risk posed by the condition, disease, illness, injury, complaint, or other medical reason for which the patient has presented to the healthcare facility for the E/M service
d. The objective clinical assessment of a patient's current health status, performed by a physician during an E/M service visit; identifies the functions, performance, and structure of the patient's physiology and health

C