In Administering Bronchodilator Therapy to a Patient with Asthma, the Nurse

In administering bronchodilator therapy to a patient with asthma, the nurse correlates the effectiveness of this classification of medication to which mechanism of action?

A) Bronchodilators widen the airways because they act on the parasympathetic nervous system.
B) Bronchodilators widen the airways because they stimulate the sympathetic nervous system.
C) Bronchodilators decrease inflammation of the airways.
D) Bronchodilators decrease the production of mucus that narrows the airways.