Final answer:
The correct answer is option c. Taft-Hartley Act.
Step-by-step explanation:
The act that lists unfair labor practices of unions is the Taft-Hartley Act. Passed by Congress over President Truman's veto in June 1947, the Taft-Hartley Act aimed to balance the powers of labor and management.
It restricted some of the powers that unions had gained under the Wagner Act, such as banning the closed shop, requiring union leaders to swear they were not Communists, limiting the use of union funds in political campaigns, permitting states to pass right-to-work laws, and giving the president the authority to intervene in strikes.
This act reflected a shift in labor policy, where the federal government took a more regulatory stance on labor unions' activities.