Reveal gaps and validate the performance of defense in depth controls is the correct option.

Routine security assessments and simulation exercises are specifically designed to uncover weaknesses across layered defenses and to confirm that controls operate as intended under realistic conditions. They exercise detection, prevention, and response mechanisms and provide measurable evidence about how well each defensive layer reduces risk.

Results from testing and simulations let teams prioritize remediation, tune controls, and improve incident response plans. Regular assessments support continuous improvement and help demonstrate control effectiveness to stakeholders and auditors.

Remove the need for continuous user training is incorrect because human behavior and social engineering remain major risk factors and assessments cannot replace ongoing training and awareness programs.

Cloud Security Command Center is incorrect because it refers to a specific security product rather than a reason to run assessments. While such tools can centralize findings and improve visibility, they do not eliminate the need to test and validate controls through assessments and exercises.

Ensure that no future breaches can occur is incorrect because no assessment or exercise can guarantee absolute prevention. These activities reduce likelihood and impact and they improve readiness, but they cannot ensure that breaches will never happen.

Full AWS Practitioner Certification Question