Correct Answer. A. Ensure both devices are logged into the same account within the app For apps that sync data across devices, it is crucial that all devices are logged into the same account.
This common oversight can prevent synchronization.
Option B is incorrect as replacing the router is an unnecessary step unless there is a confirmed network issue affecting all devices.
Option C is incorrect because data synchronization issues within an app typically are not related to mobile data limits.
Option D is incorrect as reinstalling the app should only be considered if simpler, less disruptive checks do not resolve the issue.