What is the main point the professor makes when she mentions garter snakes? A. Garter snakes contain venom that is similar to the venom of scorpions. B. Tetrodotoxin can be synthesized by a wide variety of species. C. Resistance to tetrodofoxin has evolved in some animals that feed on animals containing the toxin. D. Tetrodotoxin may have spread to newts in North America as a newts to fend off certain predators.