Why Does Active Immunity Produce Long-Term Immunity Better Than Passive

Why does active immunity produce long-term immunity better than passive immunity?

A) Active immunity always leads to having the illness though in a milder form than an unvaccinated individual.
B) Antibodies do not produce long-term immunity because they break down after two weeks.
C) During active immunity, antigens for the disease are presented to the immune system through classical antigen presentation mechanisms, so an active B-cell response and immunologic memory develop.
D) Long-term storage of antibodies maintains vaccine integrity; however, antigens cannot be stored long term.
E) All of the answers are correct.