Which of the following options is used to combine multiple transactions in QuickBooks Online?

The correct answer is the Merge Transactions Function, which allows users to combine multiple transactions into a single entry within QuickBooks Online. This is particularly useful for consolidating duplicate entries or simplifying data presentations for reporting purposes. When a user has transactions that are identical or nearly identical, merging them helps to maintain a cleaner, more organized financial record.

By using this function, users can streamline their transaction history, which aids in efficiency and clarity when managing finances. It's a common practice to ensure that reports reflect accurate information without unnecessary redundancy.

The other options do not serve the same purpose as merging transactions. For instance, Bank Rule Aggregation pertains to the application of rules to incoming transactions based on conditions, rather than merging them. Batch Transaction Processing refers to handling multiple transactions at once for inputting or editing but not combining them into fewer entries. Combined Transaction History is more about viewing the history than merging the data itself. Thus, the Merge Transactions Function specifically addresses the need to streamline and reduce duplicate entries.