Under terms of the agreement between Harley$-$Davidson and its union to help keep a motorcycle factory open, the wage for the lowest$-$paid current production worker was set as $$24\mathrm{.}10$ an hour. All new employees hired for that same job would earn $$19\mathrm{.}28$ an hour. This created a:

Contingent worker arrangement

Workforce of service workers

Tiered workforce

Workforce of knowledge workers