I think it’s either A or D
The Congress of Industrial Organizations<span> (CIO), was a federation of unions that organized workers in </span>industrial<span> unions in the United States and Canada from 1935 to 1955.</span>
If you're talking about Pearl Harbor the attack led to America joining the Allies and the end of American isolationism.
The rivers made good places for settlements and also food (fish) and water from the riveer