The correct option is A Increase blood pressure
Norepinephrine is a chemical released from the sympathetic nervous system in response to stress. It is classified as a neurotransmitter. Because the release of norepinephrine affects other organs of the body, it is also referred to as a stress hormone. An increase in norepinephrine from the sympathetic nervous system increases the rate of contraction of the heart. it also increases blood pressure and metabolism.