Cynthia is in southern Mexico. She looks for the North Star, and she sees that it is low and close to the horizon. Three days later, she visits her grandmother in northern Canada. Canada is farther north than Mexico. She sees that the North Star is much higher up in the sky than it was from her view in Mexico. What does this observation show?
A.
The North Star is moving away from Earth.
B.
The North Star is moving toward Earth.
C.
The Earth is round.
D.
The Earth spins on an axis.