Assume an auditor separates the population of accounts receivable into three groups: 1) all receivables with balances over $50,000, 2) receivables with balances between $15,000 and $50,000, and 3) all receivables less than $15,000.

All receivables over $50,000 are audited, and the auditor selects a sample of 15% of the 2nd group and 5% of the third group to be audited. Which of the following statements does NOT describe this situation?

• A)The auditor is employing systematic selection.:
• B)The second and third groups are less homogeneous as a result of the groupings.
• C)The auditor can draw a conclusion with certainty about the first group.
• D)The process makes the audit more efficient.