It's the gravitational potential energy while pushing the stone up the hill and the kinetic energy while the rock falls back down.
Option C.
Step-by-step explanation:
The punishment given by Zeus to Sisyphus was a very complicated punishment involving a different types of energy that is making Sisyphus to fail again and again repeatedly.
At first when Sisyphus will try to push the stone up the hill, the hill is steep and he will require immense energy to push the stone because he will have to overcome the gravity pull. Then when he will finally reach the top of the mountain, he will be unknowingly storing a lot of energy inside the stone as a gravitational potential energy which is directly proportional to the height of the centre of mass of an object. Thus when he reaches a top, or a considerable height, the gravitational potential energy will surpass his force and will roll the rock down again thereby converting the potential energy into kinetic energy. Thus, Sisyphus will fail again and again