Final answer:
Audit files compiled during an engagement are primarily considered the property of the client, even though they are prepared by the auditor, who may retain copies.
Step-by-step explanation:
During an audit engagement, the primary consideration for the status of audit files where pertinent data is compiled is d) The property of the client. Audit files contain evidence and documentation that support the auditor’s findings and conclusions, but it’s important to recognize that these files, while prepared by the auditor, are seen as the property of the client. This is because the data and information compiled within these files pertain to the client’s business operations. However, auditors have the right to retain copies of the audit documentation for their own records and in compliance with legal and professional standards.