According to Schachter and Singer's two-factor theory, emotion is determined by two factors.They are

A) internal and external attribution.
B) intrinsic and extrinsic motivation.
C) homeostasis and the Yerkes-Dodson law.
D) physiological arousal and cognitive labeling.

Schachter and Singer's two-factor theory proposes that emotion is determined by a combination of physiological arousal and cognitive labeling. The theory suggests that physiological arousal is necessary but not sufficient for the experience of an emotion, and that we also need to consciously interpret or label the arousal in order to experience a particular emotion.