单项选择题

A.-NO2﹥-COR﹥-COOR﹥-SO2R﹥-CN﹥-SOR﹥-C6H5
B.-NO2﹥-COR﹥-COOR﹥-CN﹥-SO2R﹥-SOR﹥-C6H5
C.-NO2﹥-SO2R﹥-COOR﹥-COR﹥-CN﹥-SOR﹥-C6H5
D.-NO2﹥-COR﹥-SO2R﹥-COOR﹥-CN﹥-SOR﹥-C6H5