travel in orbit around its moon. complete one rotation on its axis. switch orbits with the nearest planet. make one complete orbit around the Sun.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A student learns that one year on Mercury is about 88 Earth days. This means it takes 88 Earth days for Mercury to
Possibilities:
- travel in orbit around its moon.
- complete one rotation on its axis.
- switch orbits with the nearest planet.
- make one complete orbit around the Sun.

make one complete orbit around the Sun.