You are the domain administrator for . Active Directory domain. All client computers run Windows XP Professional. A user reports that she attempted to log on six times unsuccessfully. She reports that she logged on successfully yesterday. You discover that the user reset her password three days ago to comply with a new security policy that requires strong passwords. The account policies that are applied in the Domain Security Group Policy object (GPO) as shown in the following table. You need to ensure that the user can log on to the domain. What should you do?（）

• A、Reset the password for the computer account.
• B、Unlock the user account.
• C、In the user account properties, select the Password never expires check box for the user account.
• D、In the user account properties, select the User must change password on next logon check box for the user account.