Federalists believed a strong government would encourage states to work together. Federalists are those who promote ideas of federalism.
Federalism is a form of government that shares powers between central and state government. In simple words, under federalism, a single territory is controlled by both the forms of government.
Federalism is advantageous in many ways. it allows participation of states in decision making., it provides multiple opinions, it encourages the state to work in unity with other states and the central government and so on.
Federalists are those who strongly support the ideas of federalism and hence believe that a strong government would encourage states to work together.
Therefore the correct option is 3.
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