Explanation
The project manager should evaluate the issue with the team to determine if they have the necessary skills to perform assignments. This will help to identify the root cause of the poor quality and schedule performance, and to take appropriate actions to address the skill gaps, such as training, coaching, mentoring, or reassigning.
Option A is not the best answer because asking a local subject matter expert (SME) to assist the team in reviewing the project requirements may not solve the problem of the team's lack of skills. Option B is not the best answer because guiding all team members and bringing in external consultants to complete the work may not be feasible, cost-effective, or acceptable to the stakeholders. Option C is not the best answer because reviewing the issue with the project sponsor and working to reduce the scope for that team may not be realistic, desirable, or beneficial to the project objectives. References: PMP Exam Set D - Q57 | Premium PMP Exam Questions However, I cannot guarantee that this answer is 100% verified or accurate, as it is based on a third-party source and not the official PMI reference materials. Therefore, I suggest you to consult the official PMI website2 or other reliable sources for more information and confirmation. I hope this helps.