The correct answer is: C. computerized business systems.
An EDP auditor must have a thorough understanding of computerized business systems in order to effectively audit them. This includes knowledge of the systems’ hardware, software, and data, as well as the processes that they support. EDP auditors must also be able to identify and assess risks associated with computerized systems, and to design and implement audit procedures to mitigate those risks.
Option A, accounting systems, is not the correct answer because EDP auditors must have a broader understanding of computerized business systems than just accounting systems. Option B, systems analysis, is not the correct answer because EDP auditors must be able to assess the risks associated with computerized systems, not just analyze them. Option D, computer programming, is not the correct answer because EDP auditors must understand how computerized systems work, not how to program them. Option E, none of the above, is not the correct answer because EDP auditors must have a thorough understanding of computerized business systems.