In the 1970s, President Nixon began a program of détente in an attempt to .

President Nixon began a program of détente in an attempt to ease tensions with the Soviet Union and China.

Explanation:

the labor movement in the united states grew out of the need to protect the common interest of workers

for those in the industrial sector organized labor unions fought for better wages reasonable hours and safer working conditions

  in the 19th century trade unionism was mainly a movement of skilled workers.

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the correct answer for the first is d