Final answer:
Finding an appropriate combination of audit procedures is challenging and is the responsibility of the external auditor, not of management or internal audit. The auditor must tailor the audit plan to address the unique risks of each engagement through their professional assessment.
The correct option is 1.
Step-by-step explanation:
Finding an appropriate combination of audit procedures to minimize an engagement's audit risk can be challenging. When conducting an audit, auditors must assess the unique aspects of each engagement, which includes understanding the entity's environment, its internal control, and the risk of material misstatement.
This assessment is critical in determining the nature, timing, and extent of audit procedures to be applied to reduce audit risk to an acceptably low level.
The internal audit function may assist in providing insight into the internal control effectiveness, but it is the external auditor's responsibility to design and execute an audit plan that effectively addresses identified risks.
Management of the company is responsible for establishing and maintaining effective internal controls, but not for determining the audit procedures. Therefore, selecting and implementing audit procedures is a task inherently tied to the external auditor's professional judgment and expertise.
The correct option is 1.