A Can, After Having Been Given a Kick, Moves Up

Multiple Choice

A can, after having been given a kick, moves up along a smooth hill of ice. It will

A) have a constant acceleration up the hill, but a smaller constant acceleration when it comes back down the hill.
B) have a constant acceleration up the hill, but a larger constant acceleration when it comes back down the hill.
C) have the same acceleration, both up the hill and down the hill.
D) have a varying acceleration along the hill.
E) travel at constant velocity.