Federalists supported ratification of the us constitution because they

a.) believed the nation should have a strong central government.
b.) feared that the british might take over the country again.
c.) thought it would lead to the end of slavery.
d.) knew it would create a functioning government.

The correct answer is A) Believed the nation should have a strong central government.

The Federalists wanted to create a new US Constitution that would fix the problems of America's first constitution, the Articles of Confederation. Under this constitution, the central (aka federal) government had almost no powers. The federal government could not collect taxes, raise an army, or force states to follow laws passed by Congress. This is why the federalists were in favor of the new US Constitution, as it gave the federal government more power over states in order to ensure a highly efficient government.