The government launched a campaign to______ the public to the dangers of smoking.

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