How much do nonsmokers increase their risk of developing heart disease by exposing themselves to secondhand smoke at home or work?
a.) 15 to 20 percent
b.) 20 to 25 percent
c.) 25 to 30 percent
d.) 30 to 35 percent

C. 25 to 30 percent

Explanation:

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answer; /// i believe that the correct answer is (adhere to the state);

the psychologist would claim that the research results were significant.