The answer is C, because they moved from a stand still to down the hill
Newton's new “reflecting telescope” was more powerful than ... Before Newton, scientists primarily adhered to ancient theories on ... laws of motion laid the groundwork for classical mechanics. Newton's research on motion helped give credibility to the heliocentric view. Newton also helped pioneer telescopic innovations, and he is sometimes credited with inventing the first reflecting telescope. He also conducted experiments using the prism, and developed a theory about the nature of color and light.
You're right, Answer C
The dust and gas accumulate to form a solar nebula, which later on creates the star and the planets.
The object will sail away in a straight line ... continuing in the same direction it was going when the centripetal force stopped.