题目内容：
The new trend in artificial intelligence research stems from_______.
A．[ A ] the shift of the focus of study on to the recognition of the shapes of objects B．[ B ] the belief that human intelligence cannot be duplicated with logical, step-by-step programs
C．[ C ] the aspirations of scientists to duplicate the intelligence of a ten-month-old child
D．[ D ] the efforts made by scientists in the study of the similarities between transistors and brain cells
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