Brian rescues a bird that is stuck in a broken window and is badly injured. He takes the bird to a vet, where proper medical attention is given to it. Brian takes good care of the bird till it is fit...

Brian rescues a bird that is stuck in a broken window and is badly injured. He takes the bird to a vet, where proper medical attention is given to it. Brian takes good care of the bird till it is fit to fly again. According to the social exchange theory, why do people help others?

a. People often get distressed to see others in trouble and help others at least in part to relieve their own distress.

b. When people feel empathy toward others, they help if there is something in it for them.

c. Helping others gives a sense of joy and uplifts one’s mood, which spills over to other activities.

 d. Helping is an innate reaction that surfaces when we see others in distress.