Immediate Allergic Responses Occur When

Immediate allergic responses occur when

A) IgE antibodies in red blood cells cause destruction of allergens.
B) IgE antibodies in mast cells attach to allergens, releasing histamines.
C) cytotoxic T cells produce histamine in response to allergens.
D) memory T cells release cytokines in response to allergens.
E) memory B cells respond to the presence of an allergen.