Who was the other first African American that integrated a sport that might have inspired Willie O'Ree to be the first African-American to play NHL?

As a result of the columbian exchange, which crop was transferred to europe from the americas and later spread through the world? a coffee b maize (corn) c rice d olives e wheat

1. why didnt the league of nations(lon) stop germany and italy from being aggressive towards other nations before the war? a. the lon supported german and italian aggression b. the lon was only concerned about japanese aggression c. the lon didnt have an army or real power to enforce what it wanted d. the lon was busy solving the spanish civil war2. why did allied powers try to appease nazi germany before ww11? a. all the following were reasons for appeasement b. world war 1 was so terrible that many leaders never wanted another war c. many people thought the newly-streangthened soviet union was a bigger threatd. many leaders wondered if they could win another war or if their old allies (like america) would even join their side this time 3. at the end of the war what 2 countrys emerged as global superpowers? (2) a. the united states b. great britain c. france d. the union of soviet socialist republics e. germany

Which did president carter refuse to do in his attempt to free american hostages taken by iran?