Which act provides protection for workers' right to join a union?

The Labor Management Relations Act $($LMRA$)$ of $1947($Taft$-$Hartley Act$)$

The National Labor Relations Act $($NLRA$)$ of $1935($Wagner Act$)$

The Labor Management Reporting and Disclosure Act $($LMRDA$)$ of $1959($LandrumGriffin Act$)$

The Railway Labor Act $($RLA$)$ of $1926$