A correctly working vehicle suspension is used to:

A)Keep the vehicle always in contact with the ground.Correct
B)Keep the vehicle immobilised.
C)Transmit the engine rotation to the wheels.
The function of the shock absorbers is to absorb the irregularities of the terrain, thus providing stability and safety to the vehicle. But the shock absorber has a dual function — it also keeps the vehicle in contact with the ground at all times, so the driver always has control.