What Evidence Suggests That Enceladus Has Ongoing Geological Activity

Multiple Choice

What evidence suggests that Enceladus has ongoing geological activity?

A) Voyager 2 photographed liquid nitrogen geysers 10 kilometers tall.
B) Lack of impact craters on much of its surface, evidence of ice flows from possible volcanicactivity, and geysers that supply material for the E-ring.
C) Voyager 1 showed sulfur eruptions all over its pizza-pie colored surface.
D) Enceladus is located within Saturn's Roche limit, and ready to blow up.
E) Enceladus undergoes severe tidal stresses from its resonance with Titan.