When connecting doubles or triples, one of the last steps is to check the air pressure for the last trailer's air brakes. You do this by:
A) Taking a quick test drive and applying the brakes
B) Disengaging one air hose and listening for leaks
C) Pushing the "air supply" button on the rear of the last trailer to see if it has pressure
D) None of the above
Correct Answer:
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