Questions 11-13 are based on the following monologue about the pollution in Cubatao, an industrial city in Brazil. You now have 15 seconds to read Questions 11-13. What is the author’s purpose in mentioning Cubatao
A．To show that industrial development can proceed very quickly in developing countries. B．To illustrate that the pollution problem in Brazil is extremely serious. C．To show that industrial growth can cause pollution problems for developing countries. D．To show that pollution is threatening the lives of many people and the whole economy of Brazil.