Answer: Sympathetic
Explanation: Sympathetic nervous system is part of nervous system that generates the response in the form of "fight or flight" manner. This nervous system can induce the feeling of anxiety and stress which can be calmed down through meditation, yoga, deep breathing, massage etc.
The situation faced by Lionel can be related with the sympathetic nervous system of his body .As Lionel is getting prepared for his first interview , he is becoming nervous due to which his system is generating the feeling of anxiousness, faster heart beat,restlessness etc.