Which of the following are methods that can be used by a C-a…

Which of the following are methods that can be used by a C-arm operator to reduce occupational exposure for himself or herself and other personnel?  Collimate the x-ray beam to include only the anatomy of interest Use the foot pedal or the hand-held exposure switch with their cables extended away from the machine as far as possible whenever making an exposure Use magnification whenever possible to visualize body parts better