Foundation brakes are used:

At each wheel.. Section 5.1: Foundation brakes are used at each wheel.

Foundation brakes are used:

ANSWER BREAKDOWN
  • A. Correct. Foundation brakes are used at each wheel.
  • B. Incorrect. "Only on the trailer." is not correct. Foundation brakes are used at each wheel.
  • C. Incorrect. "Only on the drive axle." is not correct. Foundation brakes are used at each wheel.
  • D. Incorrect. "Only for parking." is not correct. Foundation brakes are used at each wheel.