Answer:
A. adopt the Bill of Rights
Explanation:
During the United States Constitutional convention in 1787, the Federalists and Anti Federalists have opposing views on the need to have new construction.
The AntiFederalists concerns were that the new constitution may allow the new government to have more powers and affect the rights of individuals.
However, to win the Anti Federalists over, and ratify the Constitution, the AntiFederalists concerns were most directly addressed when the country finally "adopt the Bill of Rights"