in which situation does the reactive force between two colliding objects cause a physical change?

Question

a a baseball player swinging a bat and hitting a baseball, causing the bat to shatter
b a swing hitting another swing, causing the second swing to move away
c the exhaust from a rock thrusting the rocket away from the ground
d two bumper cars at an amusement park colliding, causing both cars to change direction

Answer 1

d two bumper cars at an amusement park colliding, causing both cars to change direction