What Is the Pathophysiological Cause Surrounding Anaphylactic and Anaphylactoid Reactions

What is the pathophysiological cause surrounding anaphylactic and anaphylactoid reactions?

A) Antibody in patient serum is detected 3 to 7 days after transfusion, reacting with donor red blood cells
B) Donor plasma has reagins (IgE or IgA) that combine with allergens in patient plasma
C) A patient who is deficient in IgE develops IgE antibodies via sensitization from transfusion or pregnancy
D) A patient who is deficient in IgA develops IgA antibodies via sensitization from transfusion or pregnancy

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