Loss of factory jobs led to less in the middle class or you needed to work a white collar job to be middle class.
Industrial jobs moved overseas leaving those working in factories without jobs. Middle class jobs no longer included factory work but rather service jobs many requiring college degrees.
Answer: Tenements
Explanation: I searched the definition of each one up.
Many settle in Phoenix Az or Arizona in general
Texas
New Mexico and California
The united states of america and the confederate states of america