题目内容
（请给出正确答案）
[主观题]
The disappearance of old style. hotel porters can be attributed to the fact that ______.A．
The disappearance of old style. hotel porters can be attributed to the fact that ______.
A．few people are willing to do this type of work
B．machines are more reliable than human beings
C．the personal touch is appreciated less nowadays
D．automation has provided cheaper alternatives
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