A Foreign Antigen Has Entered the Body, Which Has Elicited

A foreign antigen has entered the body, which has elicited the immune response. A helper T cell binds to an antigen fragment on an antigen-presenting cell. What happens next? ​

A) B cells produce more antibodies.
B) ​A  cytotoxic T cell destroys the antigen.
C) ​F ree antibodies attach to the antigens.
D) ​A  macrophage engulfs the target antigen.