A properly planned and performed audit may fail to detect a material misstatement resulting from fraud because: A$)$ audit procedures that are otherwise effective may be ineffective for fraud that is concealed through collusion. D$)$ the auditor did not consider factors influencing audit risk for account balances that have effects pervasive to the financial statements taken as a whole. B$)$ an audit is planned and performed to provide reasonable assurance of detecting material misstatements caused by errors but not by fraud. C$)$ the factors considered in assessing control risk indicated an increased risk of error but only a low risk of fraud in the financial statements.