Your company has a main office and a branch office. The branch office has an Active Directory site that contains a read-only domain controller （RODC）. A user from the branch office reports that his account is locked out. From a writable domain controller in the main office， you discover that the users account is not locked out. You need to ensure that the user can log on to the domain. What should you do（）
- AModify the Password Replication Policy.
- BReset the password of the user account.
- CRun the Knowledge Consistency Checker （KCC） on the RODC.
- DRestore network communication between the branch office and the main office.