You are planning to deploy Forefront Identity Manager (FIM) 2010 in your company network. You want to provide identity management between a Human Resources application and Active Directory Domain Services (AD DS). You need to ensure that the synchronization service instance can be returned if the primary server fails. What should you implement?

A.
A cluster server

B.
A warm-standby server

C.
A software load-balance server

D.
A hardware load-balance appliance