A car of mass m starts from rest and acquires a velocity along east `vec v = vhati (v>0)` in two seconds. Assuming the car moves with uniform acceleration, the force exerted on the car is

Options

A. (a) `mv`/2 eastward and is exerted by the car engine.
B. (b) `mv/2` eastward and is due to the friction on the tyres exerted by the road.
C. (c) more than `mv/2` eastward exerted due to the engine and overcomes the friction of road.
D. (d) `mv/2` exerted by the engine.