Choose the sentence that best combines each pair of sentences in each question. Circle A, B, C or D.Câu hỏi Deforestation is considered a big environmental issue. People should take action immediately to stop it. A. Considering a big environmental issue, people should do something urgent to prevent deforestation. B. Deforestation is considered a big environmental issue which allows people to take action immediately. C. Considered a big environmental issue, deforestation should be put an end to immediately. D. Deforestation is considered the result of people’s action, so they should stop it immediately.