Final answer:
If analytical procedures reveal no material differences and misstatements are unlikely, the auditor should issue an Unqualified opinion, which signifies that financial statements are presented fairly in accordance with GAAP. The correct option is 1)
Step-by-step explanation:
If no material differences are found using analytical procedures and the auditor concludes that misstatements are not likely to have occurred, the appropriate audit opinion to issue is an Unqualified opinion. This type of opinion is also commonly referred to as a clean opinion, indicating that the financial statements present a fair and accurate picture of the company's financial position in accordance with generally accepted accounting principles (GAAP). The issuance of an unqualified opinion means that the auditor has a reasonable level of assurance that the financial statements do not contain any significant errors or irregularities.