You are designing a strategy for migrating the UNIX user accounts to Active Directory. Which three actions should you perform？（）
- A Import the user accounts as inetOrgPerson objects.
- B Import the user accounts into Active Directory by using the Ldifde command-line tool.
- C Export all user accounts from the UNIX servers to a text file.
- D Export all user accounts and their passwords from the UNIX servers to a text file. Encrypt this file to achieve extra security.
- E Assign random passwords to each user object， and securely distribute the password to the users.
- F Create the same strong password for each user object， and require users to change their passwords at first logon.
- G Instruct users to use the same name and password as they used on the UNIX servers.