A physician challenges the number of healthcare-acquired infections reported for orthopedic surgery.

Comprehensive and Detailed Explanation From Exact Extract:

In the Health Data Analytics domain, demonstrating data validity means confirming that data were collected and classified using standardized and accurate definitions.

The criteria used to classify infections (such as those defined by CDC/NHSN standards) ensure that reported infection data accurately reflect true healthcare-associated infections and are comparable across departments.

The infection control manual or antibiotic timing data support practices but do not validate the accuracy of infection classification. Therefore, option C best verifies data validity.