A)the deposition of gases from Enceladus on the particles of the E ring making them more reflective as the gas condenses on the particles
B) a continual supply of icy particles spewed via volcanism of Enceladus
C) their common origin: both the E Ring and Enceladus have a common ancestral comet parent
D) the impact history of Enceladus- a major impact cause parts of the moon to be ejected from the surface and cross the Roche Limit to become the E ring
E) the gravitational interactions by Enceladus on the particles in the E ring
