Question

? 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.

Answer 1

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