Answer:
c) An earth-centered theory by the ancient Greeks
The geocentric theory is an ancient model of the universe in which the Earth is at the center of the universe and all other objects orbit around it. This theory was proposed by the ancient Greek philosophers, including Ptolemy, who developed a complex mathematical model to describe the motions of the planets. This theory was widely accepted by scholars and was the dominant view of the universe for over 1,500 years, until it was challenged by the heliocentric theory proposed by Copernicus and later developed by Galileo and Kepler.