Mixing Gypsum,cement,or Other Materials into Soils or Regolith Is a Treatment

Mixing gypsum,cement,or other materials into soils or regolith is a treatment sometimes used to increase the strength of the soil or regolith.What is one reason you might NOT want to apply this treatment to soil or regolith near the top of a roadside embankment?

A) The material you mix into the soil or regolith will harm plant root systems, and any plants that contributed to the stability of the slope will die.
B) If the soil or regolith has decreased permeability after you mix the material into it, water will drain out of it less easily and it will become more saturated over time.
C) Operating construction equipment near the top of a slope cannot be done safely.
D) If any of the gypsum, cement, or other material leaks out of the hillside, it will be dangerous to traffic on the road.