Soils Containing Smectite Clay Minerals Have a High Potential for Swelling

Multiple Choice

Soils containing smectite clay minerals have a high potential for swelling and shrinking because

A) the relatively large, plate-shaped clay crystals pack together tightly.
B) the very small clay crystals have a large surface area to attract water molecules.
C) the clay-rich soils allow water to percolate through easily.
D) organic matter in the soils retains water during dry periods.
E) the soil particles break apart easily during freeze-thaw cycles.