During an audit of a mission-critical system hosted in an outsourced data center, an IS auditor discovers that contracted routine maintenance for the alternate power generator was not performed. Which of the following should be the auditor’s MAIN concern?

A. Fraudulent behavior by the outsourcer charging for work not performed
B. Failure of the alternate power generator during a power outage
C. High repair costs if faulty generator parts are not detected in a timely manner
D. Loss of warranty due to lack of system maintenance