Final answer:
Theodore Roosevelt supported the Open Door Policy and saw it as a way to expand American trade and influence in China.
Step-by-step explanation:
Theodore Roosevelt did not oppose the Open Door Policy, but in fact, he supported it. The Open Door Policy was a set of principles proposed by the United States in 1899-1900, which called for equal trading rights and access to China's market for all nations. Roosevelt believed in promoting US interests abroad and saw the Open Door Policy as a way to expand American trade and influence in China. He believed that open trade would benefit the US economy and help maintain peace between the Western powers in China.
Learn more about Theodore Roosevelt's stance on the Open Door Policy