A car traveled 50 miles north through a forest for 1 hour. Then the car traveled 100 miles west through a desert for 2 hours. Which statement best describes the motion of the car as it traveled through the forest and the desert?
A. The car's average speed changed, but its direction of motion remained the same.
OB. The car's direction of motion changed, but its average speed remained the same.
C. The car's average speed and direction of motion both remained the same.
D. The car's average speed and direction of motion both changed.