Answer:
B) James-Lange theory
Step-by-step explanation:
The James-Lange Theory of Emotion explains that emotions are the outcomes and results of physiological arousal to external events. According to this theory, a person who strongly feels emotion, he or she must first experience physical reactions or responses. For example, fast breathing, fast heart beating rate, sweaty hands or knotting stomach. Here in this example, knocking knees, sweaty hands and knotting stomach are all symptoms and results of physical arousal or reactions to external events when Vito's friend feels strong emotion.