Sir Isaac Newton's Celestial Mechanics Based on His Theories of Gravitation

Sir Isaac Newton's celestial mechanics based on his theories of gravitation and motion replaced the astronomical theories of Kepler and Galileo because it:

A) explained everything that the previous theories did and some additional phenomena.
B) was set on a firmer scientific basis than the older theories.
C) got rid of a system of confusing epicycles.
D) had been proved to be true with a series of brilliant crucial experiments.