参考答案

正确答案：BC
解析：Bee venom can initiate anaphylaxis: One type of immune response has to do with bees..., But stings and bites usually aren't dangerous... unless you have an allergic reaction to the venom. Peanuts can initiate anaphylaxis: No one who was with her at the time knew she was allergic to peanuts, so they didn't know why she suddenly went into respiratory distress. The reason, of course, was anaphylaxis. (2.2)