Answer:
B. Facial-Feedback Hypothesis.
Step-by-step explanation:
This was been postulated by Charles Darwin about a hypothesis where the skeletal muscle feedback from facial expressions plays a causal role in regulating emotional experience and behavior. In essence, the same point that Charles Darwin stressed on when he suggested that physiological changes were not just consequences of an emotion, but also affected that particular emotion. Our brain doesn’t just look around us for stimulus, but also looks inside us. When it senses that a muscle, which specifically comes into play when we smile, is flexing, it interprets that we are happy.