The Acceptable Air Loss Rate When Performing the Air Leakage

The acceptable air loss rate when performing the air leakage test is:

A) Less than 3 psi in one minute for both single and combination vehicles
B) Less than 2 psi in one minute for single vehicles and less than 3 psi in one minute for combination vehicles
C) Less than 3 psi in one minute for single vehicles, less than 2 psi per minute for combination vehicles
D) Less than 2 psi per minute for both single and combination vehicles