Answer:
The most suitable answer is B. Reforming city governments.
Explanation:
The Progressive era in the late 19th century and the early 20th century can be defined clearly as a "social or political movement that aims to represent the interests of ordinary people through political change and the support of government actions".
Federal government would be the best answer to the question.
This is because the anti-federalists did not desire a strong National Government but the federalists did.
I hope this answered your question, good luck on your assignment.