In November 2008, the Air Traffic Controllers Who Work at Guam

In November 2008, the air traffic controllers who work at Guam became unionized. What would NOT be a way for the union to influence labor demand?

A) Have monthly training which improves the marginal productivity of the air traffic controllers.
B) Support minimum wage laws.
C) Creating job certification which limits the number of newly certified air traffic controllers.
D) Lobby the government to limit who can apply to be an air traffic controller in Guam to those who are certified through the union.