The primary purpose of the National Labor Relations Act of 1935 (Wagner Act) was to A. establish the Social Security system B. guarantee collective bargaining rights C. ban the use of strikes by unions D. allow factory owners to use court injunctions against workers

B. guarantee collective bargaining rights.

Explanation:

The National Labor Relations Act of 1935 is a statute of labor law that was primarily designed to guarantee the right of private employed to organize trade unions, engage in collective bargaining and take collective action. The act was intended to create more equality between employers and employees. Although the act was strongly opposed by conservatives and by the Republican Party, it continues to have a deep impact on labor law in the country.