What Causes the Geological Activity Seen on Some of the Inner

Multiple Choice

What causes the geological activity seen on some of the inner moons of Jupiter

A) Constant collisions with space debris provide a power source for geological activity.
B) The strong magnetic field of Jupiter heats the surface of the inner moons.
C) Tidal friction as a result of being so close Jupiter heats their interiors.
D) Solar radiation reflected of Jupiter's surface provides a power source for geological activity.