Zayed Was Walking Down a Dark Street When He Heard

Multiple Choice

Zayed was walking down a dark street when he heard a car backfire.His heart started to race,and he began to perspire in response to this sudden,startling noise.Which division of the nervous system is responsible for his reactions

A)  sympathetic nervous system 
B)  parasympathetic nervous system 
C)  central nervous system 
D)  somatic nervous system