How does a superantigen work?

Question

a) It activates the complement cascade.
b) It binds to TCRs and MHC molecules outside the normal sites of interaction.
c) It inhibits presentation of antigen by macrophages and B-cells.
d) More than one answer is correct.

I do not think its C. I believe B is a right answer. I'm not sure about A. If A is also correct, then the answer would be D =)

Answer 1

B is the correct answer. Superantigens activate T cells without involving a normal antigen-MHC interaction, so they activate most or all T cells simulutaneously.