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A 6-year-old boy is brought to his primary care physician with a history of hay fever and asthma. He usually has two to three attacks per week. For symptom control, he uses an albuterol inhaler, but his parents would like to try something more. They would like him to take something that would lessen the amount of attacks he has. Although corticosteroids would probably work best for prophylaxis, they are contraindicated in children. He is instead given montelukast. How does montelukast works?
(A) Blocks leukotriene receptors
(B) Blocks muscarinic acetylcholine receptors
(C) Inhibits COX-1 and COX-2
(D) Inhibits COX-2 only
(E) Inhibits lipoxygenase