The wheel on a vehicle has a rotational inertia of 2.0 kg m2. At the instant the wheel has a counterclockwise angular velocity of 6.0 rad/s, an average counterclockwise torque of 5.0 Nm is applied, and continues for 4.0 seconds. What is the change in angular momentum of the wheel?

A) 32 kg m^2/s

B) 16 kg m^2/s

C) 12 kg m^2/s

D) 20 kg m^2/s