Final answer:
The Taft-Hartley Act banned unfair labor practices by employers.
Step-by-step explanation:
The Taft-Hartley Act, also known as the Labor-Management Relations Act, banned unfair labor practices by employers. Answer choice A, the Taft-Hartley Act, is the correct answer. It reversed the advances made by labor unions and restricted the powers of unions by banning closed shops and union shops. It also prohibited secondary boycotts and limited the use of union funds in political campaigns.