Alternate freezing and thawing of soils results in the "heaving" of plants and the destruction of shallow building foundations. This effect is due primarily to:
A) the wetting and drying of swelling-type clays.
B) the breaking down of soil aggregates due to freezing and thawing.
C) pressure from upward movement of water from lower horizons.
D) the hydration of adsorbed cations on the soil colloids.
E) the expansion of water when it freezes.
E
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