Astronomers Argued That the Heliocentric Model of the Solar System

Multiple Choice

Astronomers argued that the heliocentric model of the Solar System was simpler than the geocentric model, based on

A) the observation that the planets do not move relative to the background stars.
B) the fact that the Moon orbits Earth.
C) the fact that the Sun is more massive than Earth.
D) the observed retrograde motions of the planets.
E) the observed timing of lunar and solar eclipses.