The moon's path around Earth is tilted compared to Earth's orbit around the sun. The moon can be behind Earth but still get hit by light from the sun. In this diagram, you can see that the moon's orbit around Earth is at a tilt. This is why we don't get a lunar eclipse every month.
So, I think it is A.
Explanation:
I hope that helps. I don't know if it is right or wrong, but good luck :)
