The withdrawal of American servicemen
France, because the western front was fought within france.
Russia had lost a lot of people (soldiers), but did not suffer as much structural damage as France
There were multiple flaws in the Articles of Confederation. However, the biggest debate on it was that the federal government had little to no power.
Congress could not tax or draft soldiers: federal executive and judicial branches were nonexistent. The nation was unable to pay debts and laws were difficult to create because 9/13 states had to approve.
Climate change is getting worse each day. We can help the situation by reducing our greenhouse gases. Passing laws against carbon emissions is also a good start. You can also help by reducing your carbon footprint (ex. bike instead of taking a car), and encouraging others in your community to do the same. Good luck!
The establishment of the Open Door Policy (1899-1900) and the response to the Boxer Rebellion (1900) showed that the United States wanted to (2) gain access to Chinese markets. The Open Door Policy was basically a trade agreement where powers could trade openly with China, but more so in a way to reap benefits than benefiting both countries. The Boxer Rebellion was a rebellion from Chinese nationalists opposing European and American intervention for trade in China.