After this accident, it will be difficult for the government to______ people that nuclear power stations are safe.

A．to provide support for a hypothesis
B．to reconcile opposing viewpoints
C．to refute a common misconception
D．to analyze an argument in detail

A．were immunologically defenseless against measles
B．could scarcely ward off the fatal attack by the 1952 epidemic
C．were the last native people to be struck by a virgin-soil .epidemic
D．didn't come into frequent contact with White Americans until the 20th century