When You Have Been Bitten by a Highly Venomous Snake

When you have been bitten by a highly venomous snake and received a dose of venom sufficient to kill several people,you do not have the time to build up your own immunity over the next week.However,hospitals carry "antivenom" made from injecting horses with small-to-larger dosages of snake venom,and then harvesting the antibodies from the horse plasma.This is a case of

A) passive immunity.
B) active immunity.
C) developing an inflammatory response to increase the IgG production.
D) high levels of complement.
E) high levels of interferon.