Read the following text. Choose the best word(s) for each numbered blank and mark A, B, C or D. 

     Given the advantages of electronic money, you might think that we would move quickly to the cashless society in which all payments are made electronically.，a true cashless society is probably not around the corner. Indeed, predictions have beenfor two decades but have not yet come to fruition. For example, Business Week predicted in 1975 that electronic means of payment would soon "revolutionize the veryof money itself," only to itself several years later. Why has the movement to a cashless society been soin coming?

     Although electronic means of payment may be more efficient than a payments system based on paper, several factors workthe disappearance of the paper system. First, it is veryto set up the computer, card reader, and telecommunications networks necessary to make electronic money theform of payment. Second, paper checks have the advantage that theyreceipts, something that many consumers are unwilling to. Third, the use of paper checks gives consumers several days of "float" — it takes several daysa check is cashed and funds arefrom the issuer's account, which means that the writer of the check can earn interest on the funds in the meantime.electronic payments are immediate, they eliminate the float for the consumer.

     Fourth, electronic means of payment maysecurity and privacy concerns. We often hear media reports that an unauthorized hacker has been able to access a computer database and to alter information there. The fact that this is not an occurrence means that dishonest persons might be able to access bank accounts in electronic payments systems andfrom someone else's accounts. Theof this type of fraud is no easy task, and a new field of computer science is developing tosecurity issues. A further concern is that the use of electronic means of payment leaves an electronicthat contains a large amount of personal data. There are concerns that government, employers, and marketers might be able to access these data, thereby violating our privacy.