Which of the following is not an effective way of dealing with a production constraint (i.e., bottleneck)?

Which of the following is not an effective way of dealing with a production constraint (i.e., bottleneck)? Reduce the number of defective units produced at the bottleneck. overtime to workers assigned to the bottleneck. Pay overtime to workers assigned to work stations located after the bottleneck in the production process. Subcontract work that would otherwise require use of the bottleneck