SAT Subject US History Practice Question 173: Answer and Explanation

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Question: 173

64. Which factor contributed most to the rise of membership in labor unions between 1915 and 1920?

A. The efforts of progressive reformers
B. The expansion of the open shop
C. The fire at the Triangle Shirtwaist Company
D. The passage of the Fourteenth Amendment
E. The exclusion of unskilled workers

Correct Answer: A


Choices B and E would discourage union membership, the Fourteenth Amendment is not relevant, and the Triangle fire contributed only indirectly; it was the efforts of the reformers after the fire to pass legislation that made union membership go up.

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