Answer:
Constitution, according to some states, had some deficiencies which could be amended by adding a bill of rights to the Constitution
Explanation:
Even though Virginia Declaration of Rights was already issued, there were people who thought that was not enough to really guarantee such rights all over the country, for example, James Madison Jr , one of the Founding Fathers, had studied the issues to solve on the Constitution on that time and crafted the corrections, but at the endgame the proposal which satisfied all the member of the US congress was the inclusion of a bill of rights in the Constitution. This is how James Madison end up writing the United States Bill of Rights on September 25, 1789 and included in the Constitution of the United States of America.
