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2. How did glacial movement affect the landscape of Washington? Select all that apply. (2 points)

A. Advancing and retreating glaciers carved out the valley that became the Puget Sound.

B. Glaciers created vast prairies in the Columbia Plateau.

C. Glaciers deposited rich nutrients in the soil of the scablands of the southeastern Columbia Plateau.

D. Glaciers stripped all minerals from the mountain regions of the Cascades.
Massive flooding created lakes and rivers throughout the Cascades.