What was the Medieval View of The Earth and sun?

The Sun, Moon, and planets moved around the circumference of their own epicycles. In the movable eccentric, there was one circle; this was centered on a point displaced from the Earth, with the planet moving around the circumference. These were mathematically equivalent schemes. Now on the universe Medieval cosmology was centered around the concept of the Ptolemaic universe, named after Greek astronomer Ptolemy (ca. 150 CE). In this geocentric (earth-centered) model, the earth was the motionless center of the universe, with the rest of the universe revolving around it in spheres.

Explanation:

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offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering