It is crucial to concisely convey the correlation between the network storage migration and the workstation performance issues. The correct answer 'Workstation performance degraded following network storage migration for group A' contains the critical elements necessary: the effect of the issue (performance degraded), the suspected cause or related event (network storage migration), and the scope (group A). This description is clear and to the point. Other options either omit important information about the suspected cause and scope or include unnecessary verbiage that does not add value to the problem description. For example, mentioning the exact time ('since yesterday') may not add value if the migration's occurrence is already known to be in that timeframe.