C. Federalists
Step-by-step explanation:
Federalists advocated for a strong government, as they believed that having a strong government meant having a strong country. The opposite of the Federalists would be the Anti-Federalists, as they wanted a weak government and the people to have the power.
The Articles of Confederation was the United States' first constitution. It was very weak and gave little to no power to the federal government. The government could not tax the states, create and enforce laws properly, draft soldiers, regulate trade, and numerous other important things.
The Federalists wanted to get rid of the Articles of Confederation, while the Anti-Federalists wanted to keep it. Eventually, the Constitutional Convention of 1787 occurred, where the Articles were supposed to be reworked. They ended up scrapping it and the United States Constitution was created instead.