Which of the following Acts was passed in USA to balance the power of employers and unions ?

The Taft-Hartley Act (officially the Labor Management Relations Act of 1947) was passed by the U.S. Congress to rebalance bargaining power between employers and unions after the pro-union Wagner Act (National Labor Relations Act of 1935). It introduced a list of unfair labour practices by unions, outlawed closed shops, and authorized presidential injunctions against strikes threatening national health or safety.