Hamilton's Proposal Concerning the Assumption of State Debts Became Law

Hamilton's proposal concerning the assumption of state debts became law as a result of which of the following?

A) A political deal was struck by which the site for the nation's capital was to be on the Potomac River.
B) Having served under President Washington's command during the Revolutionary War, several opponents of the plan switched their votes out of a sense of duty.
C) President Washington met privately with Madison and Jefferson, and convinced them that their opposition to the proposal was divisive.
D) A joint Senate-House subcommittee agreed that those states that had paid their debts would be taxed at a lower rate than those whose debts were being assumed.