Final answer:
The Regionalist Writers were concerned about working conditions at factories and the exploitation of immigrants taking U.S. factory jobs, but not about the cost of technology like computers and tablets.
Step-by-step explanation:
The Regionalist Writers immediately after the Civil War were concerned about A. the working conditions at factories and B. the exploitation of immigrants taking U.S. factory jobs. However, they were not concerned about C. the cost of technology like computers and tablets.
Learn more about concerns of the Regionalist Writers after the Civil War