first quarter and last quarter full moon and new moon when the moon is waxing when the moon is waning
I gave my students this multiple choice question: Spring tides occur during which lunar phases?

Only one answer is correct among these 4 choices:
- first quarter and last quarter
- full moon and new moon
- when the moon is waxing
- when the moon is waning

Could you tell me which one is correct?

full moon and new moon