Which Characterizes Immediate Hypersensitivity

Which characterizes immediate hypersensitivity?

A) Antigen-presenting cells pick up the antigen and initiate a T cell response.
B) Upon first exposure to the antigen, B cells make large amounts of IgA antibodies, which bind to basophils and mast cells.
C) Some cases can be treated using desensitization, whereby small amounts of allergen are injected to stimulate a response from cytotoxic T cells.
D) Upon subsequent exposures to the antigen, mast cells and basophils release large amounts of histamine.
E) It does not include food allergies.