A development team recently completed testing changes to a company's web-based CMS in the sandbox environment. The cloud administrator deployed these CMS application changes to the staging environment as part of the next phase in the release life cycle. The deployment was successful, but after deploying the CMS application, the web page displays an error message stating the application is unavailable. After reviewing the application logs, the administrator sees an error message that the CMS is unable to connect to the database.
Which of the following is the BEST action for the cloud administrator to perform to resolve the issue?

A. Modify the deployment script to delete and recreate the database whenever the CMS application is deployed.
B. Modify the ACL to allow the staging environment to access the database in the sandbox environment.
C. Modify the CMS application deployment to use the previous version and redeploy the application.
D. Modify the configuration settings of the CMS application to connect to the database in the current environment.