During sales order processing, how will a user be alerted about stock unavailability if an availability check was conducted?

During sales order processing, when an availability check is performed and there is stock unavailability, the system's response helps users identify the specific issue efficiently. The correct answer indicates that the selected line in the sales order will be marked and highlighted by the system. This immediate visual cue allows the user to quickly recognize which item cannot be fulfilled due to stock issues.

Marking and highlighting the affected line helps streamline the workflow, as the user can easily take necessary actions such as checking alternative stock, adjusting order quantities, or exploring other solutions without needing to navigate away from the sales order screen. Using visual indications enhances the user experience, ensuring that critical information is communicated effectively.

The other options, while relevant in different contexts, don't provide the same immediate, clear indication specific to the line item as the marking and highlighting do. For instance, an error message on the status bar may be less visible depending on the user's activity. The availability control screen can offer more detailed information, but it requires additional navigation, which might disrupt the user's workflow. The incompletion log may also list issues but is not focused specifically on availability and does not provide real-time alerting for stock unavailability during order processing.