As part of a new and intriguing line of research in behavioral medicine, researchers gave mice saccharine-flavored water and followed it up with an injection of a drug that weakens mice's immune systems. Later, when these mice drank saccharine-flavored water, they showed signs of weakened immune response. Research is currently under way to see if the reverse is possible (if conditioning can be used to increase immune functioning), a discovery that would surely have important implications for new medical treatments. In this experiment, what is the saccharine-flavored water?
A) Unconditioned Stimulus
B) Conditioned Stimulus
C) Conditioned Response
D) Unconditioned Response
E) Stimulus Response
Answer: B