You are a project manager for XYZ Engineering company. Your company won the bid to add ramp metering lights to several on-ramps along an expanse of highway. You subcontracted a part of the project to another company. The subcontractor's work involves burrowing the holes & setting the lamp poles in concrete. The subcontractor's performance is not up to the mark as defined in the contract requirements documents. Which of the following is not a valid option?