In Oracle Payroll Cloud, when a worker’s payroll frequency changes (e.g., from weekly to monthly), the simplest and recommended action is totransfer the workerfrom the weekly payroll to the monthly payroll (Option B). This is done via the "Manage Payroll Relationships" task, where you update the payroll assignment to point to the new payroll definition, effective from the desired date. Option A (terminate and create a new assignment) is overly complex and disrupts continuity of employment records. Option C (update payroll definition) is incorrect, as it alters the payroll for all workers, not just one. Option D (end and add payroll record) is not a precise description of the process, as payroll records are not ended individually; the transfer handles this seamlessly. Oracle documentation outlines payroll transfers for frequency changes.