There are $3$ work stations $($WC$)$ with the following capacity: WC$1(2,000$ units$),$ WC$2(2,500$ units$),$ and WC$3(1,500$ units$).$ While the load could be shifted from WC$1$ to WC$2$ and also in the opposite direction, WC$3\text{'}$s load cannot be shifted to other WCs as a result of specialized equipment. In the following load situation, what is not a good solution?

WC$1$: $1500$ units, WC$2$: $2250$ units, WC$3$: $3100$ units

Group of answer choices

Subcontracting

Increasing the efficiency of the operation

Pushing work back

Rerouting work to another work center