18.Even people who do not have lung problems can find strong scents irritating.
(A) Polls find that about 30 percent of people are bothered by fragrances, especially strong
perfumes.
(B) Heavy perfume smells often trigger bad reactions such as headaches, itchy eyes, and
dizziness.
(C) If you give people an ambiguous scent and tell them it is something pleasant, most will
respond positively.
(D) About one to five percent of the population is very sensitive, suffering chemical
sensitivities when exposed to scents.
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