We Can Be Sure the Particles in the Rings of Neptune

Multiple Choice

We can be sure the particles in the rings of Neptune are very small because

A) the rings are faint in forward-scattered light.
B) the rings are bright in forward-scattered light.
C) only small particles are produced in comet impacts with larger moons.
D) the magnetic field of Neptune would quickly force large particles out of the rings.
E) the larger particles would be quickly destroyed by impacts with the shepherd satellites.