You are designing a strategy for migrating the UNIX user accounts to Active Directory. Which three actions should you perform?（）
- AImport the user accounts as inetOrgPerson objects.
- BImport the user accounts into Active Directory by using the Ldifde command-line tool.
- CExport all user accounts from the UNIX servers to a text file.
- DExport all user accounts and their passwords from the UNIX servers to a text file. Encrypt this file to achieve extra security.
- EAssign random passwords to each user object, and securely distribute the password to the users.
- FCreate the same strong password for each user object, and require users to change their passwords at first logon.&e