C is the main one, but D is also very important (see The Voting Rights Act)
The Federalists felt that this addition wasn't necessary, because they believed that the Constitution as it stood only limited the government not the people. The Anti- Federalists claimed the Constitution gave the central government too much power, and without a Bill of Rights the people would be at risk of oppression.
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We need more info there is no following in you question
He did not approve of slavery, he just didn't know how to end it
