The correct answer is A. Facilitating workshops.
In a control self-assessment, the responsibility for assessing controls belongs mainly to management and staff of the business unit, not to the IS auditor. The auditor's primary role is normally to act as a facilitator, helping participants understand the CSA process, discuss risks and controls, and document results in a structured way.
ISACA defines control self-assessment as an assessment of controls made by the staff of the unit or units involved, and ISACA's glossary notes that the assessment may be under the guidance of a facilitator, such as an auditor or risk manager.
Option B is not the best answer because documenting processes may occur during CSA, but it is not the auditor's primary role. Option C is not the best answer because identifying control weaknesses should primarily come from the process owners and participants; the auditor facilitates and may challenge or validate, but should not take ownership of management's self-assessment. Option D is not correct because monitoring internal controls is a management responsibility, not the primary role of the IS auditor in CSA.
This question maps to Information Systems Auditing Process because it concerns audit techniques, auditor independence, and the auditor's role in assurance-related activities. ISACA's CISA Exam Content Outline identifies Domain 1 as the Information Systems Auditing Process domain.
References: ISACA CISA Exam Content Outline, Domain 1; ISACA Interactive Glossary, "Control self- assessment"; ISACA Journal, IS Audit Basics: Doing More With Less.