Explanation/Reference:
B: Distributing an application copies deployment files to target servers and places the application in a prepared state. You can then start the application in Administration mode, which restricts access to the application to a configured Administration channel so you can perform final testing without opening the application to external client connections or disrupting connected clients.
C: Distributing an application prepares it for deployment by copying its deployment files to all target servers and validating it. After you distribute an application, you can start it in Administration mode, which restricts access to the application to a configured Administration channel and allows you to distribute the application to a production environment (or distribute a new version of an application) without opening the application to external client connections.
E: While in Administration mode, you can connect to an application only via a configured Administration channel. This allows you to perform final ("sanity") checking of the application directly in the production environment without disrupting clients. After performing final testing, you can either undeploy the application to make further changes, or start the application to make it generally available to clients.
Incorrect Answers:
A: After performing final testing, you can either undeploy the application to make further changes, or start the application in Production mode to make it generally available to clients.
Reference: http://docs.oracle.com/cd/E12840_01/wls/docs103/deployment/deploy.html#wp1023324