You are managing a Cloud SQL for MySQL environment in Google Cloud. You have deployed a primary instance in Zone A and a read replica instance in Zone B, both in the same region. You are notified that the replica instance in Zone B was unavailable for 10 minutes. You need to ensure that the read replica instance is still working. What should you do?

A. Use the Google Cloud Console or gcloud CLI to manually create a new clone database. B. Use the Google Cloud Console or gcloud CLI to manually create a new failover replica from backup. C. Verify that the new replica is created automatically. D. Start the original primary instance and resume replication.