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

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?