Which of the following would be considered a nonattest assurance service engagement? Expressing an opinion about the reliability of an entity's financial statements. Reviewing and commenting on an entity-prepared business plan.

The correct answer is, Non of these option.

Explanation:

None of these options is related to the nonattest assurance services. Non attest services are basically the financial services that are provided to the client that are not specifically related to the performance of the attest engagement. Nonattest Assurance Services include activities such as financial statements preparation, cash to accrual conversion, tax return preparation, reconciliations, etc. All such activities are related to the nonattest assurance services.