Canavanine Is Toxic to Many Herbivores but Not to Plants

Canavanine is toxic to many herbivores but not to plants. Which of the following statements regarding this differential toxicity is true?

A) Canavanine is confused with arginine in plants but not in animals.
B) Canavanine is incorporated into plant cells and causes them to fold properly.
C) Plants are able to differentiate between arginine and canavanine, whereas animals cannot.
D) Plants store canavanine in vacuoles, whereas animals metabolize it.
E) None of the above