题目

Dear Grandpa Guo, we are losing our childhoods! Please help us! Guo Chuanjie, a famous scientist, received a letter from a Beijing primary school student. The student said that many Chinese kids have to take extra classes on weekends in order to enter key middle schools. The kid hoped more people would hear his voice with Guo's help. Guo is a member of the Chinese People's Political Consultative Conference (CPPCC,中国人民政治 协商会议). Last month the CPPCC members met in Beijing. They are from all walks of life - scientists, businesspeople, doctors, artists and athletes. They give p设，则a，b，c的大小关系是                 (      ) A. c＞a＞b          B .a＞b＞c         C. a＞c＞b        D. b＞c＞a