Your network contains an Active Directory domain named contoso.com.
You plan to implement Microsoft System Center 2012.
You need to identify which solution automates the membership of security groups for contoso.com.
The solution must use workflows that provide administrators with the ability to approve the addition of members to the security groups.
Which System Center 2012 roles should you identify?

A.
Service Manager and Virtual Machine Manager (VMM)

B.
Configuration Manager and Orchestrator

C.
Operations Manager and Orchestrator

D.
Orchestrator and Service Manager

Explanation:
Service Manager is an automated helpdesk solution when combined with one or two of the other SC2012 features (see below); contains self-service portal.
Service Manager uses Workflows; which are a sequence of activities that automate a business process. When an Alert is imported into Service Manager, it
sits there as an “Event” which can then be MANAGED by an Administrator, or delegated, or Administrated etc!!!
Orchestrator as we know, is used to AUTOMATE things.
In this case, we use Orchestrator to automate the addition of members to security groups, and the Service Manager Workflows to allow the administrators to
approve the additions before implementing them
Here: We do not need to monitor anything, so we don’t need Operations Manager. We do need WORKFLOWS, which is provided by Service Manager along with
the ability to allow an Event to sit in Service Manager and wait for Administrator Interaction.
GOLDEN RULE for answering these types of question:
1. Orchestrator – AUTOMATES Things!
2. Service Manager – WORKFLOWS, Client-Portals, Allows event to be managed by Administrators!
3. Operations Manager – MONITORS, Creates Alerts, Creates Reports!

recommend an auditing solution to meet
http://www.microsoftvirtualacademy.com/tracks/system-center-2012-orchestrator-service-manager