Answer:
B. social mobility
Explanation:
Social mobility -
It refers to the motion of the people , families or any group of people within the social strata in the society is referred to as social mobility .
It refers to the alterations in the social status of the people .
The movement is done by the potential of the people , who are willing to work hard for themselves and tries to upgrade their standards of living .
Hence, from the given scenario of the question ,
The correct option is B. social mobility .