The phase of "Conducting the audit" is where the audit team executes the audit plan. This involves gathering and verifying information to generate audit findings and conclusions. Key activities in this phase include holding opening meetings, collecting objective evidence through methods like interviews with personnel, direct observation of processes, and reviewing relevant documents and records. This evidence forms the basis for the audit report and conclusions. The other phases either precede or follow this evidence collection stage.

B. Audit planning involves defining the scope, objectives, and criteria, and preparing the audit plan; it does not involve collecting evidence.

C. Audit follow-up occurs after the audit report is issued to verify the effectiveness of corrective actions taken by the auditee.

D. Preparing the audit report is the phase where the collected evidence is analyzed and documented, following the evidence collection activities.

1. ISO/IEC 19011:2018, "Guidelines for auditing management systems," Clause 6.4, "Conducting audit activities." This clause details the process of collecting and verifying information (6.4.5), which includes interviews, observations, and document review.

2. The International Journal of Accounting Information Systems, "The ISO 19011:2018 standard and its role in auditing management systems," Vol. 36, March 2020. This publication discusses the audit process stages as defined by the standard, emphasizing evidence collection during the 'conducting' phase.