When Does the NLRB Certify a Union as the Exclusive

Multiple Choice

When does the NLRB certify a union as the exclusive representative of a group of employees?

A) When the management of an organization approves of a union
B) When a union pays its dues to the board
C) When at least 51 % of the employees join the union within a certain time (30 days) after beginning employment
D) When a majority of workers vote in favor of a union
E) When the AFL-CIO votes in favor of a union