A 25-year-old woman is seen on an emergency basis while in shock, with generalized flushing of the skin and mucous membranes. A tampon is present in her vagina. Toxic shock syndrome is suspected. Which of the following mechanisms is responsible for the toxic shock syndrome?
A. Inhibition of acetylcholine release
B. ADP ribosylation of ribosomal protein
C. Stimulation of G protein
D. Cross-linking of MHC II and TCR proteins
E. Activation of adenylate cyclase
Answer: D. Cross-linking of MHC II and TCR proteins
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