Final answer:
The National Labor Relations Act (NLRA) prohibits employers from interfering with employees' rights to form labor unions and bargain collectively. The correct option is (D).
Step-by-step explanation:
The federal law that prohibits employers from interfering with employees' rights to form labor unions and bargain collectively is the National Labor Relations Act (NLRA).
This act, also known as the Wagner Act, was passed in 1935 and guarantees workers the right to organize unions and engage in collective bargaining with their employers.
The NLRA prohibits employers from discriminating against union members and requires them to recognize the legitimacy of a union if the majority of their workers are members.
It also established the National Labor Relations Board (NLRB) to resolve disputes between unions and employers.