A cloud administrator is setting up a DR site on a different zone of the same CSP. The application servers are replicated using the VM replication, and the database replication is set up using log shipping. Upon testing the DR site, the application servers are unable to access the database servers. The administrator has verified the systems are running and are accessible from the CSP portal. Which of the following should the administrator do to fix this issue?

A. Change the database application IP.
B. Create a database cluster between the primary site and the DR site.
C. Update the connection string.
D. Edit the DNS record at the DR site for the application servers.