Final answer:
The theme had the greatest impact on the history of the early United States is C. nationalism
Step-by-step explanation:
Nationalism had the greatest impact on the history of the early United States. Nationalism grew during the Revolutionary War and helped to unite the colonists in their fight for liberty against British tyranny. It also played a significant role in shaping the political framework of the newly formed nation and addressing the political and economic problems that had emerged under the British system.
During the Revolutionary War, American leaders recognized the need for a political framework to win the war and maintain peace. They worked to lay out government structures for the states and the nation, putting into practice the ideas of the Declaration of Independence. Nationalism inspired the settlers to sacrifice their private interests for the general welfare, creating a sense of unity among the colonists.
Nationalism continued to be a driving force in the early United States as the country searched for its place in the world. It played a role in the balance between state and federal governments, with the Republicans advocating for a limited federal government and more control in the hands of the states and the people. Nationalism also influenced the unification of Germany and Italy in terms of their own nationalist movements. Therefore the correct answer is C. nationalism