Sam’s teacher is trying to model the day/night cycle on Earth. One student holds a large yellow ball to represent the Sun. Another student holds a smaller brown ball to represent Earth.

How should the balls be moved to model the day/night cycle on Earth?

A) Hold the brown ball still while walking around the yellow ball in an oval path.
B) Spin the brown ball on its axis while walking around the yellow ball in an oval path.
C) Hold both balls still while the student holding the yellow ball walks in an oval path.
D) Spin the yellow ball on its axis while walking the brown ball around it in a circular path.