asked 55.0k views
2 votes
Which of these choices was a major contributor to the closing of the U.S. frontier

railroads
immigration from Mexico
the massacre at Wounded Knee
the rise of the Populist Party

asked
User Gmemario
by
7.5k points

1 Answer

7 votes
The correct answer is: [B]: "immigration from Mexico" .
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answered
User Kumba
by
8.3k points
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