The correct answer is B - Break the story up and focus on the most valuable parts. Agile promotes progressive elaboration, and large or complex stories (epics) should be broken down into smaller, testable user stories. This practice enables clarity, faster feedback, and more accurate planning.
From the PMI Agile Practice Guide:
"Large stories (epics) should be split into smaller user stories to enable understanding, estimation, and incremental delivery. Stories should be small enough to be completed within an iteration." (PMI Agile Practice Guide, Section 5.3 - User Stories and Story Splitting) Mike Griffiths states:
"When a user story is too large or unclear, the team should break it down into smaller pieces, focusing on the most valuable parts first. Story splitting is a key agile practice." (Mike Griffiths, PMI-ACP Exam Prep, Chapter 5 - Adaptive Planning) Incorrect options:
* A discourages collaboration and learning.
* C delays the resolution unnecessarily.
* D avoids solving the actual problem and abandons valuable work.