The number of reported incidents has increased is the best evidence that a recently established information security program is effective because it indicates that the organization has improved its detection and reporting capabilities and has raised awareness among employees about security issues. Regular IT balanced scorecards are communicated is not a good evidence because it does not measure the actual performance or outcomes of the security program. Senior management has reported fewer junk emails is not a good evidence because it does not reflect the overall security posture or maturity of the organization. The number of tickets associated with IT incidents have stayed consistent is not a good evidence because it does not show any improvement or reduction in security incidents or risks. References: https://www.isaca.org/resources/isaca-journal/issues/2016/volume-6/how-to-measure-the-effectiveness-of-information-security-using-iso-27004 https://www.isaca.org/resources/isaca-journal/issues/2014/volume-6/how-to-measure-the-effectiveness-of-your-information-security-management-system