space probe. space shuttle. lunar module. natural satellite.
I gave my students this multiple choice question: In 1976, the Viking I Lander was sent to Mars to analyze atmospheric gases and soil samples. The Viking I Lander was most likely a

Only one answer is correct among these 4 choices:
- space probe.
- space shuttle.
- lunar module.
- natural satellite.

Could you tell me which one is correct?

space probe.