If, when fully pressing the brake of a vehicle equipped with ABS, we feel vibrations in the pedal, what should we do?

If, when fully pressing the brake of a vehicle equipped with ABS, we feel vibrations in the pedal, what should we do?
A)Release the brake immediately.
B)Continue pressing the brake.Correct
C)Press the brake at intervals.
Strong vibrations of the brake pedal indicate that the ABS system is working, so we will continue pressing the pedal fully so that the system continues to operate.