During a stressful or threatening situation, which of the following is the best description of how the nervous systems in your body would respond? a. the parasympathetic nervous system brings the system back to normal after the sympathetic nervous systems signals to release adrenaline. b. the parasympathetic nervous system releases adrenaline and the sympathetic nervous systems calms the system back down. c. the parasympathetic nervous system senses the danger and the sympathetic nervous system responds by releasing adrenaline.