You are designing a strategy for migrating domain user accounts to the new Windows Server 2003 Active Directory environment. You want to identify the minimum number of trust relationships that need to be manually created to perform this operation. 
Which design should you use?（）

A.25
B.35
C.70
D.128
E.256

A.Configure a demand-dial router.
B.Create multiple Active Directory site links.
C.Configure a VPN connection between each branch office.
D.Install an Internet Authentication Service (IAS) server in each branch office.

A.Create a single forest that has one domain. Use OUs to separate the departments.
B.Create a single forest that has multiple domains to represent every department.
C.Create a single forest that has three domains: one for finance, one for HR, and one for the remaining departments.
D.Create multiple forests that have a single domain in each forest to represent the departments.