The correct answer is D. Items A and D are both of concern to an auditor because a company would, on its own, typically take care to make sure that liabilities are not overstated (B) and assets are not understated (C). In order to detect overstated assets (A), the auditor scrutinizes each recorded amount. Detection of understated liabilities (D) requires that the auditor look outside the accounting records for business situations that may give rise to unrecorded liabilities.