Final answer:
Increasing the height of the ramp is the change that would make it more likely for the ball to hit both the white can and the green can, as it would increase the ball's potential energy and convert to more kinetic energy for the horizontal motion.
Step-by-step explanation:
To determine which change would make it more likely for the ball to hit both the white can and the green can, it's important to understand how changes to the ramp will affect the motion of the ball. Increasing the angle of the ramp (Option 1) would generally increase the initial velocity component along the horizontal direction. However, if we want to ensure the ball has enough horizontal velocity to hit both cans, increasing the height of the ramp (Option 3) can also increase the ball's potential energy, which will convert to kinetic energy, thus increasing the horizontal component of the velocity. This would make it more likely for the ball to travel further horizontally and hit both cans.
Decreasing the angle of the ramp (Option 2) or decreasing the height of the ramp (Option 4) would generally decrease the initial horizontal velocity and thus make it less likely for the ball to reach further distances. Therefore, the recommended change would be to increase the height of the ramp to ultimately increase the horizontal distance the ball will travel.