Final answer:
A future date entered as a date of birth should be caught by a reasonableness check, which ensures data plausibility and logic.
Step-by-step explanation:
If a user enters a future date as their date of birth, this error should be caught by a reasonableness check. The correct answer is d) Reasonableness. The reasonableness check is designed to determine whether a given data point is plausible or logical in its context. For instance, a date of birth should be a date in the past, not in the future, as the event (birth) has already occurred for the individual providing the date. Therefore, if the system encounters a future date, it should flag it as unreasonable or invalid. This kind of validation is critical in forms and database inputs to maintain data integrity and prevent errors.