The Major Gaps in the Rings of Saturn Are MOST

Multiple Choice

The major gaps in the rings of Saturn are MOST likely to be caused by

A) beams of charged particles, similar to Earth's Van Allen belts, in Saturn's magnetosphere that clear out this region.
B) mutual gravitational interactions between the multitude of particles in the rings.
C) the intervention of a massive body that moved through the rings in their early history, leaving the gaps.
D) gravitational forces from Saturn and/or its moons that deflect the paths of particles that stray into the gaps.