B is the correct answer.
The primary objection of the Anti-Federalists towards the Constitution was that it made the central government too strong.
This was a worry for the anti-Federalists as they saw America as being formed as a rejection over the central monarchy in the UK and did not want to replicate any aspects of the British government in the new American country.
The correct answer is : Austria!
This was called the "Austro-Prussian war".
Before this war, Austria had the leading role among the German-speaking states, and after this war, this role shifted more to Prussia (of which Bismark was the Minister President).
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The best known of them were passed in 1865 and 1866 by Southern states, after the American Civil War, in order to restrict African Americans' freedom, and to compel them to work for low wages. Since the colonial period, colonies and states had passed laws that discriminated against free Blacks.