Which of these is an example of an adaptive (or specific) immune response?

A. A person's immune system recognizes that a bacterial infection is present and signals the hypothalamus to increase body temp

B. A person's immune system recognizes viral particles due to a previous vaccine and creates antibodies to fight off the resulting infection.

C. A person's immune system responds to dirt entering the eye by increasing tear flow and flushing the dirt out the eye.

D. A person's immune system responds to an insect bite by increasing blood flow to the area and causing it to become inflamed.