A. (seems like the best choice.)
Answer:
The adrenal gland as a whole functions to respond to stress.
Answer: C.) Exercising instead of being inactive
Explanation: All the other options are unhealthy and show poor self-discipline. Google defines self-discipline as the ability to control one's feelings and overcome one's weaknesses; the ability to pursue what one thinks is right despite temptations to abandon it. Option C shows a person with high self-discipline, instead of being inactive, they chose to exercise.
Hypothalamus doesn't release hormones into bloodstream during a stress episode.