When Teaching the Patient with Allergic Rhinitis About Management of the Condition

When teaching the patient with allergic rhinitis about management of the condition, the nurse explains that

A) over-the-counter ( OTC ) antihistamines cause sedation, so prescription antihistamines are usually ordered.
B) corticosteroid nasal sprays will reduce inflammation, but systemic effects limit their use.
C) use of oral antihistamines for a few weeks before the allergy season may prevent reactions.
D) identification and avoidance of environmental triggers are the best way to avoid symptoms.