8. the governmental body responsible for interpreting the constitution is the

When it comes to interpreting the Constitution, this job would often fall to the Supreme Court. The Supreme Court is the judicial branch of the government.  They have the highest jurisdiction of the federal law and handles cases that are against the constitution.

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 answer is a) to be able to obey them.