How does the B-cell avoid inappropriate bystander activation? Select one: a. Formation of a SMAC zone for passing of cytokines from the TFH to the B-cell b. Entry of naive B-cell into the mantle zone of the germinal center c. Binding of CD40 on T-cell to CD40L on B-cell d. Secretion of IL-10 by TFH which inhibits the activation of B-cells.

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