Questions 4 to 6 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions. Now, listen to the conversation. Which of the following statements is true, according to the conversation
A．It is the worst drought they have ever had. B．It is the second worst drought for many years. C．It is the second year they suffer from drought. D．It is the worst season for them to have drought.