 Understanding the Question:

The question asks which method best enables timely detection of changes in the security control environment.

 Analyzing the Options:

A. Control self-assessment (CSA):Allows for continuous monitoring and quick detection of any changes or deficiencies in controls.

B. Log analysis:Useful for detecting security incidents but not as comprehensive as CSA for overall control environment changes.

C. Security control reviews:Typically periodic and might not be as timely.

D. Random sampling checks:Not as systematic or comprehensive as CSA.



Control Self-Assessment (CSA):CSA involves regular, structured evaluations by internal staff to ensure controls are working effectively. It promotes early detection of issues by those directly responsible for the controls.

Timeliness:CSA is an ongoing process, making it more timely in identifying changes compared to periodic reviews or random checks.