Are the Volcanoes of Io Efficient Replacers of the Surface

Multiple Choice

Are the volcanoes of Io efficient replacers of the surface of this moon?

A) No. The volcanoes emit only gases that dissipate into space.
B) No. The volcanoes emit solid material, mostly sulfur, but this material only coats the surface with about 12 mm per century.
C) Yes. The volcanoes emit enough so that the whole surface is covered with about 1 m of new material per century.
D) Yes. The volcanoes emit enough to coat the whole surface with about 1 m of new material per year.