All the following statements are true. Which one is most important in explaining the tremendous tidal heating that occurs on Io?
A) Io exhibits synchronous rotation, meaning that its rotation period and orbital period are the same.
B) Io is the closest to Jupiter of Jupiter's large moons.
C) Io orbits Jupiter on an elliptical orbit, due to orbital resonances with other satellites.
D) Io orbits Jupiter in the Io torus, and therefore has a surface that is bombarded by many charged particles.
Answer: C