Final answer:
Proficiency refers to the competence, knowledge, and skills of an auditor, while due professional care means exercising reasonable diligence and judgment in the field of business and accounting.
Step-by-step explanation:
Proficiency refers to the competence, knowledge, and skills of an auditor, while due professional care means exercising reasonable diligence and judgment. In the field of business and accounting, proficiency is essential for auditors to perform their duties effectively and provide reliable and accurate information. Due professional care ensures that auditors adhere to professional standards and exercise caution and prudence in their work.