Which of the following findings should be of GREATEST concern to an IS auditor performing a review of IT operations?

A. The job scheduler application has not been designed to display pop-up error messages.
B. Access to the job scheduler application has not been restricted to a maximum of two staff members.
C. Changes to the job scheduler application's parameters are not approved and reviewed by an operations supervisor.
D. Operations shift turnover logs are not utilized to coordinate and control the processing environment.