The Sierra Nevada and Coast Mountain Ranges fall and elevate by a few millimeters each year. As a result of winter rains and summer groundwater pumping in California's Central Valley. Thus, option C is correct.
According to calculations by a group of geophysicists, gradual depletion of the Central Valley aquifer caused by groundwater pumping also raises these mountain ranges by a comparable amount each year.
Roughly the thickness of a dime—with a cumulative rise over the past 150 years of up to 15 centimeters (ca. 6 inch).
Therefore, The Coast Ranges, the Central Valley and the Sierra Nevadas. putting stress on the state's faults and raising the possibility of an earthquake.
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