Answer:
C: President of the United States
James Madison played a great role in establishment of the US as a republic. During the writing of the constitution, the founding fathers were adamant that they wanted democratic system of governance. However, they were torn between a direct democracy and a republican democracy. James Madison dismissed a direct democracy since the US is a large country and thus impossible to be governed through direct pure democracy. Instead, the father of the constitution argued for a scheme of representation in a republican setting. He especially lauded such a government since it even catered for the rights of the minority than in direct democracies.
Alexander Hamilton helped found the Federalists party. Thomas Jefferson and James Madison founded the Democratic-Republican party.