For a data type that records multiple contacts, which add type is appropriate?

The most appropriate add type for a data type that records multiple contacts is the response each time option. This method allows the system to capture each interaction or entry as a distinct response, making it possible to track and manage multiple contacts effectively. When users interact with this data type, they can provide information separately for each contact instance, ensuring that none of the data points are lost or combined incorrectly. This approach enhances the granularity of the contact records, allowing for detailed tracking and analysis of each individual contact interaction.

Other options, such as lookback or instant, may not provide the flexibility needed to handle multiple entries seamlessly, as they are generally designed for different types of data handling scenarios. No-add is also unsuitable for situations where multiple contacts need to be recorded, as it does not facilitate the addition of new entries.