One Major Contribution of Ptolemy to the Development of Astronomy

Multiple Choice

One major contribution of Ptolemy to the development of astronomy was to

A) develop and expand on a mathematical model for the solar system,in which planets move in epicycles around centers that move in circles around Earth.
B) derive a mathematical model for the solar system,in which planets move around the Sun in circular orbits.
C) originate the idea of a geocentric (Earth-centered) cosmology in which planets move in circles around Earth,which was later developed mathematically by Aristarchus.
D) derive a mathematical model for the solar system,in which planets move around Earth in elliptical orbits,moving fastest when closest to Earth.