The right of every worker to join a union was guaranteed in select one: a. the national labor relations act. b. the federal emergency relief act. c. the works progress administration. d. the public works administration. e. the social security administration

The correct answer is A. National Labor Relations Act.

The National Labor Relations Act, passed in 1935, is a federal law that gave private sector employees significant rights in the work place. These rights include the ability to join a union without penalty, the ability to collectively bargain with their employers over wages, and the opportunity to take collective action (like striking) against their employers if the conditions/wages are not up to par. This was history in the making, as laborers had been fighting for legal rights like this since the late 19th century.