As you perform a KUB radiograph on an elderly cancer patient who is cachexic and emaciated, you select AEC for the exposure. In order to achieve optimum image quality, you should

a. raise the kVp according to the 15% rule.
b. raise the mAs to shorten the exposure time.
c. allow the AEC system to adjust technique for the patient's condition.
d. decrease the SID to shorten the exposure time.

c. allow the AEC system to adjust technique for the patient's condition.