When the teacher was handing out this test, you noticed that your respiration rate and heartbeat increased, your palms got sweaty, and your hand shook a little. Your pretest behaviors were triggered by the ________. Upon completion of the exam, your body returned to its normal state by way of the ________.
A. Somatic nervous system; autonomic nervous system.
B. Autonomic nervois system; somatic nervous system.
C. Parasympathetic nervous system; sympathtetic nervous system.
D. Sympathetic nervous system; parasympathetic nervous system.