Which of the Following Statements Is TRUE of the Operation

Which of the following statements is TRUE of the operation of a construction industry unit?

A) In the construction industry, an employer may begin to bargain with a union before any employees are hired for a new project.
B) A construction industry unit is required to show that it represents a majority of the employees in an appropriate bargaining unit before it bargains with the employer.
C) For a Project Labor Agreement to be applicable, it is required that only union labor is used on the project.
D) A Project Labor Agreement gives a union leverage in securing necessary permits, resulting in a "labor monopoly" on the project.