Answer: Sympathetic
Explanation:
Sympathetic nervous system is the nervous system which is responsible for generating involuntary response to any stressful and fearful situation or event. Alertness of body is involved through extra blood flow and faster rate of heart beat.It can generate flight-to-freeze response in a person.
According to the question,Lionel's response is generated through sympathetic nervous system that made his heartbeat faster and sweaty palms as he was nervous and stressed for upcoming interview.