How does the heliocentric model explain the retrograde motion of Mars? Choose one:
O A. The heliocentric model does not explain the retrograde motion of Mars.
O B. The heliocentric model explains retrograde motion because epicycles result in the apparent backward
motion of Mars.
O C. The heliocentric model explains retrograde motion because Mars only appears to move backward as Earth
passes it in its orbit around the Sun.
O D. The heliocentric model explains retrograde motion because Mars sometimes physically moves backward in
its orbit around the Sun.