Explanation/Reference:
C: If you use the container_ds attribute, and if you want MapViewer to resume normal operation (for example responding to map requests with properly created maps) automatically after the database on which you defined a data source on is restarted, you must instruct the container data source to always validate a connection before it can be returned to the application.
D: You can use apViewer Administration Page to perform administrative tasks, such as configuring MapViewer to your site's specific requirements, adding predefined data sources so that MapViewer will automatically connect to the specified target database whenever it is started.
Incorrect Answers:
A: Permanent map data sources, defined in the <map_data_source> element.
References: https://docs.oracle.com/cd/E17904_01/web.1111/e10145/vis_start.htm#JIMPV9519