The nurse notes that the patient is scratching and has hives 2 hours after receiving a dose of antibiotic medication.The patient soon starts having difficulty breathing and his blood pressure drops.What is the correct analysis of the patient's condition?

A) The patient is having a mild reaction that can be treated easily with an antihistamine.
B) The patient is experiencing a moderate allergic reaction and should improve shortly.
C) These symptoms are probably due to food poisoning because very few patients have true allergic responses.
D) The patient is having an anaphylactic reaction and emergency interventions should be started.