What are two reasons early astronomers developed the geocentric model of
the solar system?
A. The model could explain why all the stars move in the same way
across the sky.
B. The model could explain why moons revolve around other planets
and not around the Sun.
C. The model could explain the apparent motions of the Sun and
Moon across the sky.
D. The model could explain the apparent backward motion of some
of the planets in the sky.
