Why Would the Auditor Be Interested to Know That Users

Why would the auditor be interested to know that users of the information produced by computerized systems review the output for obvious errors?

A) This could be an effective control against systematic errors in the programmed instructions that produces unreliable or inaccurate information.
B) This could be an effective control against errors in inputting the data that produces unreliable or inaccurate information.
C) This could be an effective control against fraud that employees or external parties may be attempting to perpetrate against the company.
D) This could be an effective control against all the issues identified.