Answer: Your answer would be
D. Popular Sovereignty
Explanation:
In the mid-1800s, Democrats believed that a policy of Manifest Destiny would boost the American economy and open up economic opportunities.
<h3>What was the
Manifest Destiny?</h3>
It meant the the idea that the United States is destined by God and its advocates to to expand its dominion and spread democracy and capitalism across the entire North American continent.
However, the Democrats believed that a policy of Manifest Destiny would boost the American economy and open up economic opportunities.
Therefore, the Option C is correct.
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