In Oracle Payroll Cloud, if costing setups (e.g., department costing information) are updated after a payroll run, the original costing results won’t reflect the new setup. To apply these retroactive changes without rolling back the entire Calculate Payroll process, you should run theCalculate Retroactive Costing process(Option B). This process recalculates costing based on the updated setups and adjusts the results for affected employees, ensuring the department costing is reflected. Option A (rolling back costing only) is not a standalone option; rollback typically applies to the full payroll process. Option C (General Ledger adjustments) is a manual workaround, not the recommended system approach. Option D is incorrect, as retroactive costing is designed for this purpose. Oracle documentation highlights this process for retroactive cost updates.