Which of the following data analysis techniques is used to identify inappropriately matching values, such...

Stratification groups numeric values into categories.

Gap testing identifies missing values in sequences.

Duplicate testing identifies repeated identical entries within a dataset.

Joining different data sources allows matching of information across disparate systems (e.g., comparing vendor names in accounts payable vs. vendor master records).

Since the question refers to identifying inconsistencies across different systems, the correct technique is joining different data sources (Option C).