A company added a read replica to an Amazon RDS for MySQL instance to handle additional read-only queries during end-of-year processing. After the period, the read replica has a steady 25% CPU usage and the primary has a steady 60% CPU usage. The company wants to rightsize the database while still providing enough performance for future growth. Which solution meets these requirements?

The correct solution is to resize the read replica to a smaller instance size and not make changes to the primary instance. The read replica's 25% CPU usage indicates it is over-provisioned for its current workload, meaning a smaller instance size would be sufficient and cost-effective. The primary instance's 60% CPU usage is a healthy utilization level, providing room for future growth without immediate resizing. Deleting the read replica would remove its read-offloading benefits. Resizing the read replica to a larger instance would be unnecessary and increase costs. Resizing the primary instance to a smaller size would reduce its capacity for future growth, while resizing it to a larger instance is not needed given its current healthy utilization.