Which of These Is an Example of "Non-Sterile Immunity

Multiple Choice

Which of these is an example of "non-sterile immunity"?

A) The complete destruction of the measles virus by the immune system response.
B) The removal of a toxin from the body by a specific antibody response.
C) Preventing the spread of Mycobacterium leprae by encasing it in nodules in the skin.
D) Immunization against the polio virus for the development of a quick immune response to destroy the virus.
E) Immune recognition and destruction of a Rhinovirus strain to which a person was previously exposed.