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? Which one of the following steps would be included in the primary response in humoral immunity?
A. A macrophage consumes a virus and displays antigens on its surface and signals helper T cells to divide.
B. Antigen binds to antibodies.
C. Cytotoxic T cells bind to infected body cells and destroy them.
D. Helper T cells activate cytotoxic T cells.

Respuesta :

I just took the test from Penn Foster and the answer was Antigen binds with antibodies (B).