Kepler was the first to propose the Heliocentric Theory instead of the three laws of celestial motion. Kepler proposed the sun-centric theory, which believed that the sun was at the center of the universe and that other planets revolved around the sun. But he did not propose a law of planetary motion. It wasn't until Newton invented the three laws of motion in 1687 that modern astronomy formally formed the basis for planetary motion. Therefore, the description of Item A was wrong. Therefore, he chose option A.