Plants Sometimes Protect Themselves from Their Own Toxic Secondary Metabolites

Plants sometimes protect themselves from their own toxic secondary metabolites by

A) producing special enzymes that destroy the toxin.
B) storing precursors of the toxic substances in one compartment and the enzymes that convert those precursors to toxic products in another compartment.
C) storing the toxic substances in mitochondria or chloroplasts.
D) distributing the toxic substances to all cells of the plant.
E) performing crassulacean acid metabolism.