Beshoi and Habiba,a Middle-Aged Couple,are Immigrants from Egypt and Have

Beshoi and Habiba,a middle-aged couple,are immigrants from Egypt and have been staying in the same neighborhood for the last seven years.They need to go to their native country to visit their ailing parents,and their neighbors offer to watch over the house while the couple is away.According to the social-exchange theory,which of the following is exhibited in this scenario?

A) a pluralistic ignorance
B) the reciprocity norm
C) the social-responsibility norm
D) the social capital