押运驾驶员应按规定带齐证件，严格按照押运路线行驶，遇有情况需改变时，可按备用路线行驶。（）

Turning cultivated land back into forests or pasture is a fundamental way to stem soil ______ and desertification in the long run.

A．erosion

B．depletion

C．violation

D．delusion