The correct response is: Many supporters of the Constitution claimed that a national bill of rights was not necessary.
During the ratification debates, some Federalists argued that the Constitution itself did not grant the federal government any powers to infringe on individual liberties, and therefore, a separate bill of rights was unnecessary. However, this claim was met with opposition from the Anti-Federalists, who believed a bill of rights was essential to protect individual liberties against potential government overreach. Ultimately, the promise to add a bill of rights was pivotal in securing ratification of the Constitution.