A.Add one offline stand-alone root certificate authority（CA）.Add two online enterprise subordinate CAs
B.Add one online stand-alone root certification authority（CA）.Add two online enterprise subordinate CAs
C.Add one online enterprise root certification authority CA）.Add one offline enterprise subordinate CA
D.Add one online enterprise root certification authority（CA）.Add two online enterprise subordinate CAs

A.Create a security group named HelpDesk. Add the HelpDesk group to the Enterprise Admins group in both domains
B.Create a security group named HelpDesk. Add the HelpDesk group to the Domain Admins groups in both domains
C.Add the Domain Admins group in the litwareinc.com domain to the Domain Admins group in the contoso.com domain. Delegate full control of the litwareinc.com domain to the Domain Admins group in the contoso.com domain
D.Create a security group named HelpDesk for each office. Delegate administrative tasks to their respective OU or domain.Delegate full control of the contoso.com domain to the Domain Admins group from the litwareinc.com domain