Diatomaceous earth can be used as a pest control because _________

• A. it is porous
• B. it contains silica which is poisonous for pests when eaten and therefore they die
• C. it snatches out lipids from the outermost waxy layer of pests called cuticle and makes them dry which results in their death
• D. it acts as anesthesia when given in minor quantities but pests die when large quantities are in taken