问题
rthquake in Japan, measuring 90 on theRichter Scale, was so violent _______ cause a series of explosions of thenuclear reactors in several power stations
A:having been invented it
B:one of whom invented
C:who had invented it
D:to have been invented
B:one of whom invented
C:who had invented it
D:to have been invented
正确答案是：
