Which of the Following Statements Is True Regarding the Free-Speech

Which of the following statements is true regarding the free-speech clause included in the Taft-Hartley act?

A) It gives management the right to express its opinion about unions to its employees,provided they carry no threat of reprisal.
B) It gives employees the right to organize a union and bargain collectively with an employer.
C) It permits closed and preferential shop agreements.
D) It allows managers to join a labor union.