For which client is guaifenesin indicated?

A. A client with chest congestion and thick mucus: Guaifenesin is an expectorant that thins and loosens mucus in the airways, making it easier to cough up and clear secretions. It is indicated for clients with productive coughs and chest congestion. B. A client experiencing anaphylaxis: Anaphylaxis is a severe, life-threatening allergic reaction that requires immediate treatment with epinephrine, antihistamines, and supportive care. Guaifenesin does not address the pathophysiology of anaphylaxis. C. A client with recurrent epistaxis: Recurrent nosebleeds are not treated with guaifenesin. Management involves identifying the underlying cause, nasal care, or topical interventions rather than an expectorant. D. A client with seasonal allergies: Seasonal allergies primarily cause sneezing, itching, and watery eyes. Antihistamines or intranasal corticosteroids are indicated, whereas guaifenesin does not relieve allergy symptoms.