Answer :
The primary purpose of the Federalist Papers was to "(3) encourage ratification of the United States Constitution," which was to replace the Articles of Confederation.
I believe the answer is: (3) encourage ratification of the United States Constitution
According to the Federalist, the initial draft of the constitution did not provide many aspects that should exist in order to fully guard's citizens' natural rights. This lead to the creation of the Bill of Rights, which later on implemented to the constitution and became the first 10 among many others amendments of the united states constitution.