Answer:
Option: C. Epicycles.
Step-by-step explanation:
The geocentric solar system of Ptolemy is known for its epicycles. Epicycle (circles within circles) is known for explaining the speed and direction of the motion of the Sun, Moon, and planets. It also elucidates the changes that appear in distances of the planets from the Earth. In the ancient period, epicycles was considered to be highly accurate and worked well.