What Evidence Is There That Supports the Suggestion That Enceladus

Multiple Choice

What evidence is there that supports the suggestion that Enceladus is adding material to Saturn's E ring?

A) The E ring is densest at the orbit of Enceladus.
B) Impacts by meteorites have been observed that put material into the E ring.
C) Volcanic eruptions have been observed that released material into the E ring.
D) Enceladus' magnetic field captures particles from the solar wind and deposits them in the E ring.
E) Enceladus' mass has decreased over the last fifty years while the mass of the E ring has increased.