One of the key challenges with managing historical data include

• A. Sourcing historical data due to the propensity for large volumes of data to be purged from systems
• B. Various instruments have widely divergent price levels
• C. Predecessor and successor mapping to identify changes over time
• D. Performing statistical analysis on data that does not include weekends and holidays

Answer: (C)

Tracking how records change over time is essential when you manage historical data. Predecessor and successor mapping links each version of a data item to its previous and next version, letting you reconstruct the full history, see exactly when a value changed, and maintain a clear audit trail. This approach directly addresses understanding changes over time in historical data, making it the best fit for the task.

The other points describe related issues but not the mechanism for tracking history. Sourcing historical data due to purge speaks to data availability rather than how changes are tracked; divergent price levels across instruments highlight data quality or normalization concerns; and omitting weekends and holidays affects statistical analysis and continuity, not the core method for managing historical records.