An air brake-equipped truck is traveling on a highway at 60 mph and the driver makes a service brake application. Which of the following should be true in all of the spring brake chambers on the vehicle?
A. Only the hold-off chambers are charged with air
B. Only the service chambers are charged with air
C. Both the service and hold-off chambers are charged with air
D. Neither the service nor the hold-off chambers are charged with air
C. Both the service and hold-off chambers are charged with air
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