After LaTonya Arrived on the Scene of the Fire and Saw

After LaTonya arrived on the scene of the fire and saw her friend alive but badly burned, she began to feel very dizzy.One of the paramedics saw that she was about the faint and had her sit down.He explained that her dizziness was caused by

A) an overreaction of the parasympathetic nervous system.
B) the failure of her sympathetic nervous system to properly respond.
C) an underreaction of her somatic nervous system.
D) an overreaction of the somatic nervous system.