Why didn't the united states join the league of nations?
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a. democrats in congress did not support it.
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b. european leaders did not want america involved.
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c. woodrow wilson rejected the idea.
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d. republicans in congress opposed the idea.

When it came to the Congress to approve the joining of the United States in the League of Nations it was blocked by the Republican opposition, especially from Senators William Borah and Henry Cabot (D).  

The U. S. public opinion was still disappointed over the outcomes of the war. Also, the Republican Senators did not like what they thought to be a violation of the U.S. sovereignity: the covenant of the League in it's Article X predicted that in case of a member being attacked all the others should defend it.

This added to the historical isolationism of U.S. diplomacy stopped the country from joining the League of Nations despite its inspiration on President Woodrow Wilson’s Fourteen Points.

april 18, 1775, hundreds of british troops marched from boston to nearby concord in order to seize an arms cache.a confrontation on the lexington town green started off the fighting, and soon the british were hastily retreating under intense fire.

on april 19, 1775, american militia gathered to stop a british company sent from boston to capture supplies allegedly amassed in lexington, massachusetts. the militia fled, and the british left after not finding the supplies.