You manage a meeting booking application that uses Cloud SQL. During an important launch, the Cloud SQL instance went through a maintenance event that resulted in a downtime of more than 5 minutes and adversely affected your production application. You need to immediately address the maintenance issue to prevent any unplanned events in the future. What should you do?

A. Set your production instance's maintenance window to non-business hours. B. Migrate the Cloud SQL instance to Cloud Spanner to avoid any future disruptions due to maintenance. C. Contact Support to understand why your Cloud SQL instance had a downtime of more than 5 minutes. D. Use Cloud Scheduler to schedule a maintenance window of no longer than 5 minutes.