Answer:
C. equal to the force of friction exerted upon the car.
Step-by-step explanation:
If a car is traveling on the highway at a constant velocity, the force that pushes the car forward must be equal to the force of friction exerted upon the car.
If an object has a constant velocity, this means that there is no net force acting upon it. In other words, the forces acting upon it are balanced. When a car is traveling, the force of friction caused by the road and the air opposes its motion. For the car to keep a constant velocity, a force must be applied to exactly balance the force of friction.