Your network contains three Active Directory forests. Each forest contains an Active Directory Rights
Management Services (AD RMS) root cluster.
All of the users in all of the forests must be ableto access protected content from any of the forests.
You need to identify the minimum number of AD RMS trusts required.
How many trusts should you identify?
A.
2
B.
3
C.
4
D.
6
Explanation:
http://technet.microsoft.com/en-us/library/dd772648(v=ws.10).aspx
For example, if you have three (3) AD RMS domains and all of them should be able to exchange information
between each other, there must be (32) 6 trusts configured to achieve this goal. N*(N-1)