In the context of the PMP objectives, when faced with unforeseen circumstances that impact project acceptance criteria, the project manager should adapt the project management plan and activities to align with the new conditions while still meeting the project objectives. Transitioning on-site training to online sessions is a proactive approach that ensures the training objectives are still met despite the shift to remote work. This aligns with the PMI's emphasis on flexibility and adaptability in project execution.
: = The PMP Examination Content Outline and the PMI Guide to Business Analysis, which emphasize the importance of meeting project objectives and adapting to changes in project execution12.

In the context of project management, when a team member encounters an issue such as a non-working computer, it is essential for the project manager to take a proactive approach to resolve the issue promptly.
This is to ensure that the project work is not delayed and the team member can continue contributing to the project. According to the PMBOK guide, the project manager should facilitate problem-solving and provide support to team members to address and resolve issues that can impact project progress1.
References:
* PMBOKGuide - Seventh Edition1
* PMP Examination Content Outline - June 20192
* Professional in Business Analysis Reference Materials3

Comprehensive and Detailed Explanation:
Significant estimation discrepancies often indicate a lack of clarity. The story may be ambiguous or too broad.
In agile practices, the team should ask the product owner to refine the story so it can be better understood and estimated with greater accuracy.
A (averaging) is not an agile practice.
C may be helpful but not sufficient in real time.
D is arbitrary and ignores team consensus.
B supports agile practices like backlog refinement.
References:
Agile Practice Guide, Chapter 5 - Estimation and Planning
Scrum Guide - User Story Definition and Refinement
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