The correct response based on the circumstances preceding the ratification of the Constitution is that many supporters of the Constitution claimed that a national bill of rights was not necessary. This was a common argument used by Federalists, who believed that the Constitution itself provided sufficient protection of individual liberties through the structure of the government and checks and balances. However, this claim led to significant opposition from Anti-Federalists, who argued for the inclusion of a Bill of Rights to explicitly safeguard personal freedoms.
While some states did have their own bills of rights at the time, not all did, and the eventual adoption of the Bill of Rights in 1791 addressed the concerns raised during the ratification debates.