Frost wedging is most effective ________.

A. in the winter when the rock is frozen solid for months on end
B. in the summer when abundant rainfall percolates through the cracks to freeze in contact with the very cold rock found deep below the surface
C. in the spring and fall in very dry desert areas where temperatures dip down below 0°C at night and above 0°C during the day
D. in areas with many days of freezing and thawing


Answer: D

Environmental & Atmospheric Sciences

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