On the moon, where $g$~~$1\mathrm{.}6\frac{(m)}{s^2},$ a heavy rock and a light rock are dropped simultaneously from the same height and experience no significant air resistance as they fall. Which of the following statements about the rocks is most correct?

Just as they were released, both rocks had the same amount of gravitational potential energy.

When they reach the ground, the lighter rock has more kinetic energy than the heavier rock.

Both rocks have the same kinetic energy when they reach the ground.

The heavier rock reaches the ground before the lighter rock.

When they reach the ground, the heavier rock has more kinetic energy than the light rock.