You look down while sitting at the top of the Ferris wheel. You immediately feel your heart start to pound. You are confused by this response until you remember your last experience on a Ferris wheel. During that experience, the wind started to blow, the seats began to rock, and you thought you were going to die. You realize your heart is pounding because you are afraid. Which of the following theories best explains this sequence of events?
A. Watson-Rayner theory
B. Cannon-Bard theory
C. James-Lange theory
D. two-factor theory

Two-factor theory: In psychology, the "two-factor theory" was proposed by famous psychologists and researchers named Jerome E. Singer and Stanley Schachter. The two-factor theory is a theory related to the emotion of an individual and is also referred to as "Schachter's two-factor theory of emotion".

The theory describes that an individual's emotions generally consist of two different factors including cognitive label and physiological arousal. Firstly, a few types of arousal will happen such as perspiration, increased heart rate and after that, an individual puts specific labels to the given arousal and later on he or she experiences emotion.

In the question above, the given statement signifies the "two-factor theory".