What do electronic Internet malls enable merchants to do?

The choice that highlights what electronic Internet malls enable merchants to do is indeed about processing sales under one merchant number with multiple sub-merchant numbers. This structure allows merchants to streamline their payments and financial reporting within a centralized system while still accommodating various sub-merchants or businesses under the larger umbrella of the mall.

This arrangement is beneficial as it simplifies the transactions that occur within the mall platform, ensuring that all sales can be managed and tracked efficiently under the main merchant account. This is particularly useful for managing separate brands or products without the complexities that come with having entirely distinct merchant accounts for each sub-entity. This setup fosters an easier payment process for customers and enhances the management capabilities for the merchants.

In contrast, the other options focus on aspects that do not fully capture the primary function of electronic Internet malls regarding merchant operations. For instance, becoming part of a national database for fraud prevention is more about security measures rather than the core functionality of processing transactions. Similarly, functioning as traditional storefronts does not effectively convey the distinct nature of online operations compared to physical stores. Limiting sales to certain regions does not resonate with the broader reach and accessibility that electronic Internet malls typically offer to merchants. Therefore, the ability to process sales through a unified framework is the key feature enabling