Final answer:
ABS works by measuring individual wheel speeds to prevent wheel lock-up during braking and maintain steering control.
Step-by-step explanation:
The correct answer is c) Wheel speeds. ABS stands for Anti-lock Braking System, which works by electronically measuring the individual wheel speeds of a vehicle.
By monitoring the wheel speeds, ABS can regulate the braking pressure on each wheel to prevent them from locking up during hard braking, allowing the driver to maintain steering control.