Q: Fact 1: Threatening behavior causes a fight-or-flight response in animals. Fact 2: Fear also causes adrenaline to surge, which is part of the fight or flight response. Given the two facts above, threatening behavior causes?

Select from: A. to move people B. population movement C. adrenaline to surge D. hypothyroidism E. a pathogens F. Plant growth is reduced G. Greenhouse gasses H. hyperthyroidism
The answer is:
C.