Explanation
= In an agile project, the project manager should use various methods to monitor and track the project performance and progress, such as burn charts, cumulative flow diagrams, Kanban boards, etc. These methods can help the project manager identify any impediments or issues that may affect the project delivery and take corrective actions as soon as possible. The project manager should also encourage the team to raise any impediments during the daily stand-up meetings and facilitate the removal of those impediments. By seeking and implementing alternative ways to track progress and impediments, the project manager can prevent the situation where a technical impediment puts the project delivery in jeopardy overnight. B, C, and D are not the best answers because they do not address the root cause of the problem, which is the lack of effective monitoring and tracking of the project performance and progress. Historical data, technical training, and risk response plan are useful tools and techniques, but they are not sufficient to prevent the situation described in the question. References: PMBOK Guide, PMI Study Hall, PMP Question Bank PMBOK Guide, 7th edition, pages 128-129, 132-133 :
https://www.pmi.org/pmbok-guide-standards/foundational/pmbok