An eclipse of the moon occurs when the earth lies in a direct line between the sun and the moon, such an eclipse does not occur every month, however. because

• A.the moon will be rotating about its own axis at that time.
• B.the earth will be rotating about its own axis at that time
• C.the revolution of the moon about the earth is in a different plane to the revolution of the earth about the sun
• D.the earth takes than one month to revolve around the sun