Why Are Children of Low-Income Families at a Higher Risk

Why are children of low-income families at a higher risk for asthma than those from wealthier families?

A) Their parents are less likely to be able to afford proper medical care.
B) Their homes and schools are often located near major roads or factories.
C) They have poor diets.
D) They purchase more products that contribute to indoor air pollution.
E) Their schools are poorly ventilated.