While travelling at 100 km/h the foot brake fails. How can the vehicle be stopped?

While travelling at 100 km/h the foot brake fails. How can the vehicle be stopped?
A)With the handbrake only.
B)By pressing the clutch pedal and the brake pedal several times.
C)By shifting down to lower gears and finally using the handbrake.Correct
By releasing the accelerator and allowing engine braking to gradually reduce speed (through rolling resistance). In addition, this engine braking can be increased by shifting down to lower gears and using the handbrake if necessary, but always in a smooth and progressive manner.