单项选择题

It can be inferred from what Maia Ramnath said that______.

A.today's activists are focusing on a quite different point from the radical past
B.some Weathermen are aiming at overthrowing the present U.S. government all along
C.the actions the Weathermen take at present are similar to the preceding ones
D.the authorities know nothing about what the Weathermen are going to do