Final answer:
The Open Door policy allowed the United States to have equal access to China's markets, compete with other nations, and maintain its influence in Asia.
Step-by-step explanation:
The Open Door policy was introduced by the United States in 1900 and had a significant impact on U.S. policy in Asia in the coming years. The policy aimed to ensure access to China's markets by all nations on equal terms, preventing any one country from gaining exclusive advantages. By promoting free trade and opposing colonialism, the United States sought to protect its commercial interests and maintain a balance of power in the region. The Open Door policy allowed American businesses to expand their trade in China without facing territorial limitations or legislative responsibilities. This gave the United States an opportunity to compete with other nations, especially European powers, and access China's lucrative markets. The policy also helped the United States maintain its influence in Asia and establish itself as a global power without resorting to military force.