[单项选择]

These days searching for a number in a five centimeter thick telephone directory seems very old-fashion. Voice recognition systems are becoming more and more common and efficient: the best of them apparently recognize 49 out of every 50 words.
These devices save companies a huge amount of money. Stephen Evans in New York has been talking to the machines and to the men who design them.
I had a bit of Basil Fawlty moment the other day; I rang 411, the American directory enquiries which now uses a voice recognition system. I told the machine I wanted the number for "Harlem Auto Mall" and she—for this machine had a female voice—replied Harlem Public School 154. No doubt, like lots of people, I found myself ranting.
Machines, you see, have personalities, and banks, phone companies, railways and all kinds of alleged help lines are spending a lot of money trying to find out what kinds of voices to give the machines that speak to us, the publ
A. Female voices can less persuade people compared with male voice.
B. Male voices are perceived to have energy and authority.
C. Female voices are more likely to convince people.
D. Male voices are easy to threat people.

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