and the reason

A Which of the following statements is generally correct about audit evidence? The auditor's direct personal knowledge, obtained through observation and inspection, is more persuasive than information obtained indirectly from independent outside sources. B. To be appropriate, audit evidence must be sufficient C. Accounting data alone may be considered sufficient appropriate audit evidence to issue an unqualified opinion on financial statements. D. Appropriateness of audit evidence refers to the amount of corroborative evidence to be obtained