During an account receivables audit, an internal auditor found a significant number of input errors resulting in a $500, 000 balance understatement.
Which of the following is the most important question the internal auditor should ask to develop an appropriate recommendation for this finding?

Which of the following control methods is effective in reducing the risk of purchasing-scheme fraud?
1. Periodically reviewing the vendor list for unusual vendors and addresses.
2. Segregating duties for amount purchasing, receiving, shipping, and accounting.
3. Validating sequential integrity of purchase orders.
4. Verifying the validity of invoices with post office box addresses.

A credit card company detects potential errors in credit card numbers by checking whether all entered numbers contain the correct amount of digits. This is an example of which of the following IT controls?

Which of the following is an example of a risk management avoidance response?

The internal audit supervisor is reviewing the workpapers prepared by the staff. According to the Standards, which of the following statements regarding workpaper supervision is not true?