The correct answer is A, because a general action plan can be acceptable when multiple nonconformities share the same root cause, provided that the plan clearly addresses that root cause and demonstrates how recurrence will be prevented. ISO/IEC 27001 clause 10.1 requires organizations to determine the causes of nonconformities and implement corrective actions proportionate to the effects of those nonconformities. It does not mandate a one-to-one relationship between nonconformities and action plans.
In Scenario 8, both nonconformities stem from a common underlying issue: the absence of a formal information labeling procedure aligned with the information classification scheme. The mislabeling of information and the incorrect storage of sensitive information on removable media are consequences of this single systemic weakness. Therefore, a consolidated action plan targeting the root cause is conceptually acceptable.
However, the issue in the scenario is not that the plan was general, but that it lacked sufficient detail, such as clear action steps, responsibilities, timelines, and identification of affected systems and controls. Certification bodies require action plans to be specific, verifiable, and capable of being assessed for effectiveness.
Option B is incorrect because ISO standards do not require separate action plans for each nonconformity when a shared root cause exists. Option C is incorrect because audit team leader approval alone does not make an inadequate plan acceptable.
Thus, while a general action plan is acceptable in principle, it must still be detailed and robust to support certification.