If a slope in unconsolidated material is unstable due to high water content,
A. it may best be stabilized by covering the slope with impermeable material.
B. it may be stabilized by steepening the slope angle.
C. nothing can be done to modify the hazard.
D. it may be dewatered by installation of drainage pipes.
Answer: D
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Fill in the blank(s) with the appropriate word(s).
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