Which of the Following Is True of the Allergic Response

Multiple Choice

Which of the following is true of the allergic response?

A) It is a normal, healthy, adaptive response to an allergen.
B) Upon the very first exposure to an allergen, an allergy sufferer will probably experience a runny nose, watery eyes, and mild wheezing.
C) Sufferers produce the IgE class of gamma globulins in response to allergens.
D) All of the above answers are true.