Answer:
c. persistent poverty.
Explanation:
Persistent poverty -
It refers to the group of people , whose income is below 60% of the national median value of the income for at least 2 out of 3 continuous years , is referred to as persistent poverty .
The people lies in this group are classified as the underclass .
Due to very low standard of living , these people are at the risk of poverty line.
Hence , from the given information of the question,
The correct option is c. persistent poverty .
