A、By educating them.
B、By rewarding them for reporting cases.
C、By isolating them from others.
D、By giving them vaccinations.
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正确答案
试题解析
细节题。从第三段第二句提到的“Rewards for reporting smallpox assisted in motivating the public to aid health workers.”,可知对报告天花病例的人发放奖金的做法激励了民众来协助卫生组织人员展开根除天花的运动。因此选项B为正确答案。