What Does the Surface of Europa, a Satellite of Jupiter

What does the surface of Europa, a satellite of Jupiter, look like?

A) It is entirely ice, with fractures and ridges going in every direction and no features more than about 100 m high.
B) It is entirely ice, with light and dark areas containing many impact craters and parallel ridges up to about 1 km high.
C) The surface is rocky and densely cratered, except for a few large, dark, relatively uncratered plains.
D) We don't know; the surface is hidden below a dense layer of clouds.