With a CR System, When Using AEC to Image a Patient

With a CR system, when using AEC to image a patient who is having difficulty holding still, increasing the mA (if the unit allows) will:

A) Be a bad idea because the patient will be overexposed
B) Be a bad idea because the patient will be underexposed
C) Be a good idea because the exposure time will increase
D) Be a good idea because the exposure time will decrease