What method should be used to import a file that will be different every time?

The correct choice for importing a file that will be different each time is the method that allows new entries to be added and existing entries to be updated or replaced based on the unique identifiers in the data. This method ensures that regardless of how the incoming data changes, the system remains up to date with the latest information.

When a file is different every time, you want to maintain flexibility. The method known as Add/Update is most effective because it checks for existing records in the system. If a record matches based on a unique identifier, it updates the existing entry. If no match is found, it adds the new entry to the system. This approach is essential for efficiently managing data that is subject to change.

Using an approach like Overwrite would not be suitable, as it could result in losing valuable data from previous records if the incoming file does not include all existing entries. Hence, the Add/Update method is optimal for merging the latest information with what is already present in the system while minimizing data loss and ensuring data integrity.