Which of the following is an example of the endocrine system maintaining homeostasis?

A. Detecting a pain stimulus and sending a signal to the spinal cord to perform an automatic response
B. Discharging an excessive amount of hormones in the blood and not sending a signal to stop production
C. Sending a message to the pituitary gland to start producing a hormone when the levels in the body are too low
D. Using sense organs to get information about the outside world and direct an appropriate body response release