Which of the following has the GREATEST impact on the effectiveness of an organization’s security...

When security is embedded in organizational culture, it becomes a shared responsibility, increasing adherence and effectiveness.

“A security-aware culture is a key component of an effective security program because it encourages responsible behavior and supports ongoing risk management.”

— CISM Review Manual 15th Edition, Chapter 3: Information Security Program Development and Management, Section: Security Culture

ISACA’s practice questions identify security culture as the foundational element impacting the organization’s entire security posture.