I’m going to say A ...controlling inflation. Could be wrong but worth a try
A. A person with a higher income pays more money in taxes.
A progressive tax's percentage is dependent on what income bracket you are in. So if you are in a higher income bracket (you earn more) then you would pay a bigger percentage than someone in a lower income bracket. That is why it is a "progressive tax", because it gets progressively bigger.
D because it’s part of the industrial revolution
Generally speaking, Congress put federal troops in the South to ensure that the most basic elements of Reconstruction were being adhered to, however many see Reconstruction as a failure due to the fact that Congress stopped enforcing it too soon--leading to the rise of Jim Crow laws.