The correct answer is C. According to the PMBOK Guide, the project manager should evaluate the impact of any deviations or defects on the project scope, schedule, cost, quality, and risks, and initiate the change request process to obtain approval for any corrective actions1. The project manager should also communicate the change request to the relevant stakeholders and update the project management plan and other documents accordingly2. Asking the product designer why the deviation was not considered, reporting to the project sponsor that the product is working, or asking the quality team to discard the sample and test again are not appropriate actions, as they do not address the root cause of the problem, nor do they follow the change control procedures. References: 1: PMBOK Guide, page 112-113; 2: PMBOK Guide, page 121-122