the moons of Jupiter the bacteria that causes disease the deep-sea trenches in the ocean the parts of a plant that perform photosynthesis
I gave my students this multiple choice question: The first telescopes were invented hundreds of years ago. Which was discovered as a result of this invention?

Only one answer is correct among these 4 choices:
- the moons of Jupiter
- the bacteria that causes disease
- the deep-sea trenches in the ocean
- the parts of a plant that perform photosynthesis

Could you tell me which one is correct?

the moons of Jupiter