One evening Betty was walking to the dorm from the gym when two men who demanded her money stopped her. Since she was a good athlete, Betty decided to make a run for it. Pretending to open her purse, she suddenly turned and dashed off. Although pursued, Betty outran her assailants. During this incident, which part of Betty's nervous system was most directly responsible for her successful escape?
◦ central nervous system
◦ parasympathetic nervous system
◦ sympathetic nervous system
◦ forebrain
◦ midbrain