Final answer:
The auditor is least likely to omit tests of controls for several major accounts when performing an integrated audit of a public company's financial statements. Correct option is C.
Step-by-step explanation:
When an auditor performs an integrated audit of a public company's financial statements, it is least likely for the auditor to omit tests of controls for several major accounts. This is because the auditor needs to assess the effectiveness of internal controls over financial reporting as part of the integrated audit. The auditor is required to issue an audit report on internal control over financial reporting, which helps determine the reliability of the company's financial statements.
On the other hand, the auditor is also required to issue an audit report on the financial statements themselves. Furthermore, performing tests of internal control design effectiveness is an essential part of the integrated audit as it helps evaluate whether the company's internal controls are appropriately designed.