请认真阅读下列短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。
A
One night, I was partying in central London, near Piccadilly Circus. Running short of money, I set off to find the nearest ATM to withdraw some cash. At Shaftesbury Avenue, I saw a huge queue for one ATM machine, but no one was using the neighboring “hole in the wall”. Assuming that the second machine was broken, I asked one queuing man if it was out of order. He replied, “It’s working, but this one pays out twenties for tenners!”
So the reason for the weirdly long queue is that these folks wanted to “double their money” by getting £20 notes for each £10 note requested. Being an honest man, I didn’t hang about; I simply used the idle machine and walked off.
Last week, customers took similar advantage of Commonwealth Bank in Sydney, Australia. Following overnight maintenance, a computer virus caused CommBank’s ATMs to fail to function properly and begin paying
