Hay Fever That Occurs When People Are Exposed to Pollen

Hay fever that occurs when people are exposed to pollen involves an excess release of IgE, which binds to _ and causes them to .

A) mast cells : stimulate the proliferation of cytotoxic T cells
B) mast cells : degranulate, releasing histamine
C) pollen : stimulate the release of histamine
D) T helper cells : stimulate the proliferation of cytotoxic T cells
E) macrophages : destroy the pollen whose by- products stimulate histamine release