16. Disc brakes work by: A. Pressing inward, on a disc, to stop it from turning B. Pressing outward from a disc, to stop a drum from rotating c Stopping a disc inside the transmission D Stopping the drive axle

The correct answer is A. Pressing inward, on a disc, to stop it from turning.<br /><br />Disc brakes work by pressing inward on a disc, which is typically a metal rotor attached to the wheel. When the brake pedal is pressed, the brake pads are forced outward by hydraulic pressure, pressing against the disc and creating friction that slows down or stops the rotation of the wheel. This friction is what allows the vehicle to come to a stop or slow down.