A Kid Slides Down an Icy (Frictionless) Hill Starting from Rest

A kid slides down an icy (frictionless) hill starting from rest. At the top his gravitational potential energy is 500 J.
-Suppose after reaching the bottom he then continues sliding up another icy slope on the other side of the valley.When he finally comes to a stop he will have reached a height

A) equal to the height he started from on the other hill.
B) less than the height he started from on the other hill.
C) more than the height he started from on the other hill.
D) none of the above

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