Doreen's science class is studying a section of their textbook on nature and the environment. Doreen is assigned a 5-minute presentation about one of the chapters in which she has to persuade someone to see her point of view. Which of the following would make a solid thesis for Doreen's essay? A. Whaling has taken its toll on almost all of the species of whales in the entire world. B. Because our planet's health depends upon biological diversity, we should save the whales. C. We must save the whales because whales are the most important animal in the world. D. Endangered species lists show how many species are on the brink of extinction.