To find the net force acting on the car, we need to subtract the force of air resistance from the forward force provided by the engine.
The forward force from the engine is 2000 N, and the air resistance acting in the opposite direction is 800 N.
Net force = Forward force - Air resistance Net force = 2000 N - 800 N = 1200 N
Since the net force is positive and in the direction of the engine's force, the car will move 1200 N forward.
Therefore, the correct answer is 1200 N forward.