Which of the following statements is true about a bank account disconnection in QuickBooks Online?

The statement that no warning is displayed during the disconnection process is true because when you disconnect a bank account in QuickBooks Online, the action is generally straightforward and does not prompt a warning or confirmation dialog. This means users can proceed with the disconnection without additional notifications, making the process convenient but requiring users to be mindful of managing their connections responsibly.

As for the other options, they do not accurately reflect the behavior of QuickBooks Online concerning bank disconnections. For instance, while transactions can typically be redownloaded after a reconnection, there may be restrictions based on the last download date or the account's settings. Additionally, bank rules are not automatically preserved once a disconnect occurs, which means users may need to set them up again after reconnecting. Lastly, the ability to download transactions typically has a limit based on the financial institution's policy, which generally does not allow transactions older than a certain period—in most cases, 90 days—making the statement regarding the 180-day download limit inaccurate.