问题详情

During the 2001 G8 summit in Genoa, Italy, _____.
A．protestors used water cannons against riot police
B．riot police threw homemade firebombs at demonstrators
C．some active protestors were killed by the police
D．tears gas was resorted to by police against demonstrators请帮忙给出正确答案和分析，谢谢！