When creating a data source, how can you add additional connections to different databases?

A. From the drop-down menu of the current connection, select Edit Connection.

B. From the Connections pane, select Add.

C. From the Data menu, select New Data Source.

D. From the File menu, select New.

Explanation:
On the Tools menu, click Data Connections.
In the Data Connections dialog box, click Add.

Reference: https://support.microsoft.com/en-us/office/add-a-data-connection-to-a-microsoft-sql-server-database-c26193cc-8520-4941-adec-1df637bbf03a