Which of the following is a simple sentence? a. though some people believe a non-fatal snake bit can create immunity to snake venom, they have actually probably received only a dry bite during which the snake released little venom. b. snakes are important, but most people don't like them. c. pythons have become a problem in the everglades; thousands released during hurricane andrew have naturalized in the environment. d. herpetologist dr. roan stevens specializes in the study of exotic snakes native to tropical rain forests.