A student went outside every night for eight nights to look at the Moon. The pictures below show how the Moon looked each night
day 1
day 2
day 3
day 4
day 5
day 8
day 6
day 7
What caused the changes in the appearance of the Moon that the student observed?
ОА.
the revolution of the Earth around the Sun
OB. the rotation of the Moon on its axis
OC. the rotation of the Earth on its axis
OD. the revolution of the Moon around the Earth