What was the function of the Articles of Confederation that were ratified in 1781?

What effect did john hay’s open door policy letters have on the imperial powers of britain, france, germany, russia, and japan? a. it provoked the imperial powers to declare war on the united states. b. it caused the imperial powers to restrict trade in their trade with china. c. it warned the imperial powers that the united states would soon declare war on china. d. it signaled to those powers that the united states would take a larger role in world affairs than before.

What kind of contact did christopher columbus and native americans initially have?

Is harry truman considered a hero or a tyrant for dropping the atomic bombs on hiroshima and nagasaki? (need a paragraph)