The function of a proportioning control valve (PCV) in a brake system is to

• A. Ensure that equal pressure is supplied to the front and rear brakes throughout every braking operation
• B. Reduce the brake fluid pressure when the brakes approach their lockup point
• C. Cause less brake fluid pressure to act on the front brakes than on the rear brakes when the fluid pressure exceeds a predetermined level
• D. Cause less brake fluid pressure to act on the rear brakes than on the front brakes when the fluid pressure exceeds a predetermined level