Which of the Following Best Describes the First Standard of Field

Which of the following best describes the first standard of field work?

A) The auditor must adequately plan the work and properly supervise any assistants.
B) The auditor must have adequate technical training and proficiency to perform the audit.
C) The auditor must maintain independence in mental attitude in all matters relating to the audit.
D) The auditor must exercise due professional care in the performance of the audit and the preparation of the report.