C. The hitter has put a lot of external force on the ball.
Step-by-step explanation:
- When high external force is applied to a ball that is hit harder, it flies farther
- Three forces act on the baseball in flight - lift, drag and weight
- Weight - directed towards earth's center
- Weight can be determined by Newton's laws of gravitation
- Drag - When the ball moves through air, a resistance force (drag) is applied to its motion
- Drag - Directed along and opposite to flight direction of the ball
- Lift - aerodynamic force perpendicular to the flight direction