An IS auditor has been assigned to review IT structures and activities recently outsourced to various providers. Which of the following should the IS auditor determine FIRST ? 
A、That an audit clause is present in all contracts 
B、That the SLA of each contract is substantiated by appropriate KPIs 
C、That the contractual warranties of the providers support the business needs of the organization 
D、That at contract termination, support is guaranteed by each outsourcer for new outsourcers