On what basis are all National Sex Offender Registry records maintained?

The correct choice is based on the fact that the National Sex Offender Registry records are maintained primarily through documented criminal history information. This means that the information contained within the registry is derived from official records of individuals who have been convicted of sexual offenses. This documentation is critical because it ensures that the data is accurate, reliable, and legally verified, which is essential for law enforcement agencies and the public to assess potential risks and ensure community safety.

Maintaining records in this manner allows for a structured approach to monitoring sex offenders and provides a way to track compliance with registration requirements. It relies on legal documentation rather than subjective sources or personal opinions, which could vary widely and lead to inconsistencies in the data. Hence, the integrity of the information in the registry is upheld through meticulously gathered criminal history information.