Some stars appear in the night sky only during certain seasons of the year.
Which statement explains this observation?
A The earth's nighttime view of space keeps changing as the earth rotates on its axis.
B The earth's nighttime view of space keeps changing as the earth revolves around the sun.
C The earth moves closer to some stars and farther away from others throughout the year.
D Some stars move closer or farther away from the earth throughout the year.
