Question

What was the main reason the United States announced the Open Door Policy? to help spread democracy to Southeast Asia to prevent the victory of the Chinese Communists to ensure that U.S. businesses could operate in China to remove restrictions on Chinese immigration to the United States

Answer 1

"To ensure that U.S. businesses could operate in China" is the best option from the list. The reason is the US was scared that if it lost the Chinese market it would loose a great deal of revenue.