The geocentric model was accepted for more than a thousand years primarily because it correctly explained the motion of the planets as observed from Earth, including the retrograde motion of planets, using a complex system of epicycles. Additionally, the model was philosophically and religiously aligned with the belief that Earth occupied a central position in the universe, which resonated with various cultural and theological views of the time. However, the most straightforward answer from the options provided is:
It correctly explained the motion of the planets.