Which steps are involved in the activation and maturation of B cells in response to an antigen?

• A. Antigen binding, activation, proliferation, maturation into effector and memory cells.
• B. Activation, antigen binding, proliferation, effector cell formation.
• C. Proliferation, antigen binding, activation, memory cell formation.
• D. Antigen binding, immediate memory cell formation, proliferation.

Answer: (A)