$A$ person entering an empty room suddenly finds a snake right in front on the right side. Which one of the following is likely to happen in his neuroendocrine system?

• A
  Sympathetic nervous system is activated,releasing epinephrine and norepinephrine from the adrenal medulla.
• B
  Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse.
• C
  Hypothalamus activates the parasympathetic division of the brain.
• D
  Sympathetic nervous system is activated,releasing epinephrine and norepinephrine from the adrenal cortex.