What type of B cell is like a tiny factory that produces antibodies identical to the B cell receptor that bind to the original antigen?

ANS:C - Plasma cells

B cells differentiate into plasma cells that produce antibody molecules closely modeled after the receptors of the precursor B cell. Once released into the blood and lymph, these antibody molecules bind to the target antigen (foreign substance) and initiate its neutralization or destruction.

This prolific production of antibodies is an integral part of the humoral immune response.