单项选择题

听力原文： Many people dislike walking into the bank standing in long lines and running out of checks. They're dissatisfied with the bank's limited hours too. They want to do some banking at night and on weekends. For such people, their problems may soon be over. Before long, they may be able to do their banking from the comfort of their own home any hour of the day, any day of the week. Many banks preparing online branches or internet offices, which means that people will be able to take care of much of their banking business through their home computers. This process is called interactive banking. On these online branches, customers will be able to view all their accounts, move money between their cards. Customers will also be able to pay their bills electronically and even email questions to the bank. Banks are creating online services for several reasons. One reason is that banks must compete for customers who will switch to another bank if they are dissatisfied with the service they receive. The convenience of online banking appeals to the kind of customer banks most want to keep, that is people who are young, welleducated and bare good incomes, Banks also want to take advantage of modem technology since they have moved into the 21st century.
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A．Their business hours are limited.
B．Their safety measures are inadequate.
C．Their banking procedures am complicated.
D．They don't have enough service windows.