A 5.0 Cisco Unity system is built as follows:

voice mail only deployment
Exchange 2003 server configured as the mailstore

They must import users as follows:

New templates and classes of service have been built.
There is no electronic file for import.
There is a written list of user names and extensions.

The system must be tested before users are added. Which procedure will best test the system and then proceed with the import?

A.
Procedure 1:
Load all users.
Test the MWI indicator for each.

B.
Procedure 2:
Load one user. Test the MWI.
Load the remaining users.

C.
Procedure 3:
Enable Cisco Unity test mode.
Load one user. Test the MWI.
Load the remaining users.

D.
Procedure 4:
Add a single user.
Test with the New Subscriber Load Tool.
Observe the MWI.
Load the remaining users.