Which of the following is a problem that can be addressed by using a version control system?

• A. Poor performance when conducting complex calculations on big data
• B. Getting rejected features when trying to buffer data without geometry
• C. Output data not matching desired schema
• D. Tracking down when problems emerged in a workspace is difficult because there is no record of what has changed and when

Answer: (D)

Version control provides a record of changes to a workspace, who made them, and when. This history makes it possible to trace back to the exact moment a problem was introduced by inspecting commits, comparing different versions, and understanding the sequence of edits. With this, you can identify which change likely caused an issue, revert to a known good state, or create a branch to test a fix without disrupting the main workflow. The other scenarios describe problems that relate to performance, feature choices, or data schema concerns—not to preserving and analyzing the sequence of edits—which is the primary benefit of using version control.