Correct Answer: ABThe most likely reason for the recurring security flaw in an application, despite it being identified and remediated previously, is a lack of change management controls. Change management controls are critical for ensuring that changes to software are implemented correctly and consistently. They include processes for documentation, testing, and approval of changes, which help to prevent old flaws from reappearing in new versions of the application. Without these controls, it is easy for previously fixed issues to resurface.