Final answer:
Auditors prioritize the potential for computer disruptions in recording online sales transactions due to the significant risk of inaccurate financial reporting and fraud, as well as the high-profile data breaches that have occurred in recent years impacting online privacy and security.
Step-by-step explanation:
When evaluating internal control of an entity that processes revenue transactions on the Internet, an auditor would be most concerned about the potential for computer disruptions in recording sales.
This concern is paramount because any disruption in the computer systems could lead to inaccurate financial reporting and undetected fraud or errors.
Moreover, given the recent high-profile data breaches at companies like Target and JP Morgan, the integrity and availability of the transaction processing systems are critical for maintaining online privacy and security, preventing identity theft, and ensuring the entities' financial data remains reliable.
Furthermore, the potential for disruptions can have a cascading effect on the trustworthiness of the revenue cycle. If systems are not resilient to attacks or technical failures, revenue figures may not only be incorrect but could also result in significant reputation damage and financial loss to the entity.
Therefore, while other factors such as the lack of sales invoice documents as an audit trail, the frequency of archiving and data retention, and the inability to establish test data are important, they are less critical when compared to the potential for system disruptions.