Diagram A is accurate because sometimes the whole Moon is dark if shadows are covering it. b Diagram B is accurate because the Moon is as close as it can be to the sun, and so all of the Moon is lit by the sun. c Diagram C is accurate because the half of the Moon that is facing the sun is lit by the sun, and the other half is dark. d All three diagrams are sometimes accurate because the Moon has some lighter-colored rock and some darker-colored rock, and the half of the Moon with the lighter-colored rock rotates to face different directions.
