Answer: The United States had taken possession of the Philippines (as well as Guam and Puerto Rico) in 1898, after winning the Spanish-American War. Thus US interest in Asia was heightened.
At the same time, other nations had begun competing for "spheres of influence" in trade access with China.
Further detail:
The Open Door policy was issued by the United States in 1899-1900 as a series of dispatches from the US Secretary of State to other nations that had trading interests in China -- Great Britain, Germany, France, Italy, Japan, and Russia. The policy reasserted earlier agreements that all countries should have equal access to ports in China, without undue preference to "spheres of influence" for one nation or another. The United States was seeking to maintain an equal footing with other nations in the access to trade in China.
The correct answer is <em>Raising the tariffs.</em>
Harding administration passed the Emergency Tariff Act in the year 1921. Raised tariffs was mainly on farm products. By raising tariffs on foreign goods, foreign products become more expensive. As a result of the increased prices on foreign goods, the U.S citizens would purchase items manufactured within their own country, in return raising their countries economy.
The Emergency Tariff of 1921, increased rates on wheat, sugar, meat, wool and other agricultural products brought into the United States from foreign nations. Hence, protecting the domestic producers of those items.
A) they had alliances with eroupeian to send out expesetions
