Which Example Would BEST Represent Job Crowding in Labor Markets

Multiple Choice

Which example would BEST represent job crowding in labor markets?

A) Workers in right-to-work states choose not to join the union.
B) Female workers choose flexible jobs that are more conducive to parenting.
C) Discrimination forces workers into secondary sectors with poor working conditions.
D) Too many people choose the same career, causing a surplus in the labor market.