Experiments That Subject Animals to Mild but Uncontrollable Electric Shocks,loud

Experiments that subject animals to mild but uncontrollable electric shocks,loud noises,or crowding have shown that such experiences

A) directly cause diseases like cancer.
B) lower the body's resistance to disease.
C) strengthen the animals' capacity to deal with future stressors.
D) lead to the animals becoming more aggressive in interacting with members of their own species.