Parents of a Child Who Experienced a Moderately Severe Allergic

Parents of a child who experienced a moderately severe allergic reaction after eating peanuts ask the nurse what they can do to help if it happens again. Which response by the nurse is the most appropriate?

A) "If it happens again, I will teach you what to do."
B) "You should have an antihistamine like Benadryl with you at all times."
C) "We can start a desensitization process to take the allergy away."
D) "I will teach you how to use an Epi-Pen."