You want to view benefit cost by benefit enrollment for the current year compared to...

To evaluate year-over-year changes in benefit costs and enrollments, you need historical data comparisons over time. TheTrending Reporttype is designed for exactly this use case, leveraging data sources likeTrended Workersto display snapshots at periodic intervals and calculate variances between time periods.

From the Workday binder:“Trending reports allow you to track changes to worker data across time. These reports support analysis of headcount, demographics, benefit enrollments, and cost variances year-over-year or month-over-month.”

Advanced and Matrix reports provide strong analysis capabilities, but they are based on current or related effective-dated data, not time-series snapshots. Composite reports combine multiple subreports but do not inherently manage trending data or variance calculations across years.

Therefore, the only correct option for year-over-year benefit enrollment and cost variance isD. Trending Report.