Construction work is being carried out for a railway route passing close to a mountain slope. Why is it necessary to cover the mountain slope with a wire mesh?

A.
Wire mesh transmits electrical pulses to soften the rock.
B.
Wire mesh protects vegetation on the slope from emissions.
C.
Wire mesh prevents rocks from sliding down the slope and onto the train track.
D.
Wire mesh absorbs surface runoff water, especially during heavy precipitation.
E.
Wire mesh absorbs shockwaves from the ground during mild seismic events.

C. Wire mesh prevents rocks from sliding down the slope and onto the train track.