This plan is known as the Open Door Policy.
This idea was introduced by Secretary of State John Hays in 1899. The goal of this plan was to ensure that all nations had the ability to trade with China. Even though this plan referred to the ability of all nations to trade with China, the real reason behind its development was the fear of the US government being blocked out of trading with China by European countries.
The bloodiest battle of the war (Gettysburg) and the bloodiest single day of the war (Antietam) were both fought in this theater. The capitals of Washington, D.C., andRichmond<span> were both attacked or besieged.</span>
New factories in germany put people out of work this is a social reason for migration
"<span>A. It amounted to an informal declaration of Cold War" would be the best option, but it was not even remotely formal--in that it simply said that the US would come to the aid of any countries in danger of becoming communist. </span>
The answer is a for u but i am not sure there has to be more explanation for this