Which term holds date-specific information about a data entity to track changes over time?

• A. Contacts
• B. Items
• C. Values
• D. Records

Answer: (A)

Tracking changes over time means tying date-stamped history directly to the data entity you’re watching. The container that holds that time-based information for each real-world person or entity is the contact record. With a contact, you can store events and updates—each with a date—so you can see how the contact’s details looked on any given day. For example, you might note when an address changed or a phone number was updated, and you can reconstruct the contact’s state at that date.

Values are the individual pieces of data themselves, such as an address or phone number. Items are the fields that hold those data values. Records generally refer to the data entries or snapshots themselves, but the ongoing, date-specific history is what sits with the contact, making it the best fit for tracking changes over time.