Final answer:
The audit technique that typically cannot be conducted by a computer program is the resolution of differences reported by customers. Human judgment is required for this task, unlike other automated processes like tracing transactions or randomly selecting accounts.
Step-by-step explanation:
The question concerns the audit techniques suitable for computer-assisted auditing of a company's billing and accounts receivable records. Of the options provided, the technique that could not typically be performed through a computer program is d. Resolving differences reported by customers on confirmation requests.
While a computer can assist in identifying discrepancies through automated matching and analysis, the process of resolving these differences often requires human judgment and direct communication with customers. Options a, b, and c are all tasks that can be automated using computer programs.
For example, tracing audited cash receipts to accounts receivable credits, selecting accounts on a random basis, and examining invoices for completeness and validity can all be performed using specialized audit software.