Question

Parents, friends, and relatives of children with asthma should try to stop smoking. Until they can successfully quit, they should smoke only outdoors, not in the home or in the family car. They should not allow others to smoke in the home, and should make sure the child's school is smoke-free. Which source would provide the MOST bias-free information about second hand smoke as a trigger of asthma? A) an advertisement by an air-purifying systems corporation B) an editorial by an asthma sufferer pushing for a ban on public smoking C) a pamphlet from a tobacco company about the dangers of secondhand smoke D) a brochure from the respiratory information council at Johns Hopkins University

Answer 1

D is the correct answer

Answer 2

D, because it's written by professionals from professionals
C, Smoke companies will say its ok because they want more people to smoke 
B, The asthma person can be totally biased because it's an easy topic to persuade people on.
A, Air purifiers are good but they just want you to buy their products.