In the massive antismoking campaign in China in 1989, the results indicated that ____% of the 10,000 fathers in the intervention group quit smoking for at least six months, in comparison to a control group of 10,000 in which only ____% quit smoking.

A. 1; 0.1
B. 12; 0.2
C. 22; 2.2
D. 50; 25


Answer: B

Psychology

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