Is it appropriate for an IS auditor from a company that is considering outsourcing its IS processing to request and review a copy of each vendor's business continuity plan? 
A、Yes, because an IS auditor will evaluate the adequacy of the service bureau's plan and assist their company in implementing a complementary plan. 
B、Yes, because based on the plan, an IS auditor will evaluate the financial stability of the service bureau and its ability to fulfill the contract. 
C、No, because the backup to be provided should be specified adequately in the contract. 
D、No, because the service bureau's business continuity plan is proprietary information.