Apolitician who argues that poverty causes people to reject the practices of "mainstream" society is making a(n) argument.

The answer is the culture of poverty.
A culture of poverty argument, a politician who argues that poverty causes people to reject the practices of mainstream society.
The poverty is the result of the people's norms or values, in the theory of culture of poverty it explained that the people who are poor have different cultural values rather than the mainstream society.

The answer is c) protestant clergy