If one were researching asthma triggers, which of the choices is a conclusion that can be supported by this passage?
a) you cannot improve the environment for someone who suffers from asthma.
b) people with asthma should move to someplace with low humidity and no pollution.
c) asthma's effects are often exaggerated, so care should be taken not to worry over asthmatic symptoms.
d) you can improve the environment by not allowing smoking in the house or car, keeping the humidity low to prevent mold growth and bathing pets weekly to reduce allergens.