Which of the following audit steps would an internal auditor most likely be questioned on?

According to the CIA Exam syllabus, internal auditors must design and perform procedures that provide sufficient, reliable, relevant, and useful information (Standard 2310). Simply visually confirming equipment on-site does not confirm ownership; it only establishes physical existence. Ownership requires review of purchase invoices, titles, or registration documents.

The other procedures listed (vouching checks, reconciling invoices with shipping documents, and recalculating allowances) are appropriate and provide reliable audit evidence. Option A would therefore be questioned, as it does not sufficiently address the stated audit objective of ownership verification.