the moon-like phases of Venus the phases of Earth's moon a lunar eclipse a solar eclipse
I gave my students this multiple choice question: Which of the following can only be seen with a telescope?

Only one answer is correct among these 4 choices:
- the moon-like phases of Venus
- the phases of Earth's moon
- a lunar eclipse
- a solar eclipse

Could you tell me which one is correct?

the moon-like phases of Venus