Evidence That There Is a Considerable Amount of Water Frozen

Evidence that there is a considerable amount of water frozen under the surface of Mars is provided by all of the following except

A) squishy-looking flow patterns around crater impact sites.
B) features resembling channels cut by flowing water.
C) periodic eruptions of geysers when subsurface ice is melted by volcanic activity.
D) discovery by the Mars rovers of chemicals in surface rocks formed in the presence of large amounts of water.
E) satellite measurements of water in the polar caps.