C) proposed that the sun was the center of the solar system
Explanation:
The Heliocentric model was proposed by Nicholaus Copernicus which describes the sun at the center of the solar system. The Earth with other planets and moons revolves around it in concentric orbits. Later, Kepler gave planetary laws which describes the planetary orbits as elliptical. Before heliocentric model, Ptolemy's geocentric model was popular which considered Earth as the center but it was proven incorrect with the Heliocentric model.
