HELPPPPP PLEESEEEEEEE! ITS DUE IN 5 MORE MINUTES!!!!!!!!!!!!
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