Which of the following is the best thesis statement for Taylor to add to his essay after sentence 4? A. Global warming has been exaggerated by scientists and researchers. B. Global warming is caused by factors that are beyond the control of people. C. Humans are responsible for causing global warming, and we should make serious and conscious efforts to manage this problem. D. Global warming is a serious environmental issue that needs to be discussed in forums and conferences by the leaders of all nations.