<span>The economic system of the South came to dominate the United States economy.</span>
Answer:
The Americans gained independence after the American revolution and this revolution helped them to get an identity that they belong to one nation.
Explanation:
The people who were living in the United States of America were a colony of the Great Britain and they wanted to get freedom for that. For getting independence, the people fought a revolution which was known as the American revolution against the people of the Great Britain. This atmosphere which was created had new ideas, new sense of freedom developed the feeling of national identity.
D is the answer to your question
The French and Indian War was referred to as the Seven Years' War.
