单选题 Passage Three Banking organizations are highly geared, much more than commercial or industrial compa-nies. They have custody of large volume of monetary items, which makes them vulnerable to misappropriation and fraud. They therefore need to establish formal operating procedures, well defined limits for individual discretion rigorous system of internal control. Banking organiza-tions engage in a large volume and variety of transactions. This necessarily requires complex accounting and internal control system and widespread use of electronic data processing. Bank-ing organizations often assume significant commitments without any transfer of funds. These items may not involve accounting entries and consequently the failure to record such items may be difficult to detect. And most importantly, the failure of a bank, unlike most commercial firms, affect more than the fortunes of its shareholders and creditors, and may destabilized the whole economy. Effective supervision of banking organizations is an essential component of a strong eco-nomic environment in that the banking system play a central role in making payments and mobi-lizing and distributing savings . Strong and effective banking supervision provides a public good that may not be readily available in the marketplace. Along with effective macroeconomic poli-cy , it is critical financial stability in any country . While the cost of banking supervision is in-deed high, the cost of poor supervision has proved to be even higher. For all these reasons, banks throughout the world are generally accorded a higher degree of official , supervision and regulation than other types of businesses . At the same time , banks are also provided with important elements of official protection . For example , the central bank usually acts as a lender of last resort to protect commercial banks against a temporary liquidity drain. This protection is an important component of the official safety net bankstopping the banking system. Another major aspect of that safety net takes the form of deposit insurance fund to guarantee bank depositors that they will get their money back in the event of a bank failure .