When Radiographic Images of Patients Are Created,many Exposure Variables Come

When radiographic images of patients are created,many exposure variables come into play to produce optimum image quality.Any change in the radiographic image appearance should be the result of

A) the experience and competency of the technologist.
B) the radiation output of the X-ray machine.
C) the patient's medical condition as reflected in the image characteristics.
D) computer processing to enhance image contrast.