Imagine a section of highway with a large outcrop of fractured rock that poses a serious rockfall hazard.  Which of the following engineering controls would be the best choice for minimizing the chance of large rocks falling onto the roadway?

A. build a retaining wall
B. control the flow of water
C. cover the slope with vegetation
D. install a mesh fence
E. install rock bolts


Answer: E

Environmental & Atmospheric Sciences

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