Why Does Swelling Clay Swell

question 2

Multiple Choice

Why does swelling clay swell?

• A) Landsliding pushes the edges of the grains, so they buckle and thicken.
• B) Freezing causes the water in them to swell.
• C) Water gets into the clay layers, spreading them apart.
• D) Drying the clay makes it swell like cooking a cake.
• E) Deformation of grains during sliding interleaves clay flakes, making them thicker.

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