While reviewing the workpapers and draft report from an audit engagement, the chief audit executive (CAE) found that an important compensating control had not been considered adequately by the audit team when it reported a major control weakness.Therefore, the CAE returned the documentation to the auditor in charge for correction.Based on this information, which of the following sections of the workpapers most likely would require changes?

1. Effect of the control weakness

2. Cause of the control weakness

3. Conclusion on the control weakness

4. Recommendation for the control weakness

a. 1, 2, and 3

b. 1, 2, and 4

c. 1, 3, and 4

d. 2, 3, and 4