A nurse is caring for a client who has a peanut allergy. The client states. "I feel like my throat is closing "Which of the following actions should the nurse take?

Rationale: A. Deliver 2 L of oxygen via partial nonrebreather mask: While oxygen can support airway function, it does not address the underlying cause of anaphylaxis. Airway closure due to an allergic reaction requires immediate pharmacologic intervention, not just oxygen delivery. B. Give epinephrine intramuscularly: Epinephrine is the first-line treatment for anaphylaxis. It counteracts bronchoconstriction, airway edema, and hypotension by stimulating alpha and beta receptors, and should be administered immediately when signs of airway compromise are present. C. Administer diazepam PO: Diazepam is used for anxiety or seizures, not for acute allergic reactions. It has no effect on reversing airway swelling or bronchospasm and would delay the appropriate emergency treatment needed in this situation. D. Notify the radiology department: Contacting the radiology department is not relevant or urgent in this scenario. The client is experiencing a life-threatening reaction that requires immediate medical intervention, not communication with non-emergency services.