What did the U. S. prevent Red China from joining​

During wwi, literacy tests were used to control immigration, which marked a return of what type of ideology in some americans?

Which man believed that african americans should actively fight for the rights they deserve, even if they put their lives in danger?

How were the okanogan highlands formed? a. by subduction, which caused huge folds in earths surface b. as a result of retreating glaciers carving great valleys into the earth c. when molten rock from under the earth approached the surface d. when the collision of volcanic island chains and ocean rocks formed new earth