With respect to the outsourcing of IT services, which of the following conditions should be of GREATEST concern to an IS auditor? 
A、Outsourced activities are core and provide a differentiated advantage to the organization. 
B、Periodic renegotiation is specified in the outsourcing contract. 
C、The outsourcing contract fails to cover every action required by the arrangement. 
D、Similar activities are outsourced to more than one vendor.