A thumping sound may be a warning of a blowout. If this happens, ease your foot off the _______ pedal and keep a _________ grasp on the steering wheel. Do not __________ suddenly. Pull safely off the roadway and check your tires.
a) Brake, firm, accelerate
b) Accelerator, loose, brake
c) Brake, loose, accelerate
d) Gas, tight, brake