单项选择题
Which of the following is not the authors’ description about “the second machine age”?
A.The digital interconnection of the people on earth will further accelerate the second machine age.
B.The character of the second machine age is the combination of machine intelligence and billions of interconnected human brains.
C.3D printers, speech recognition and synthesis systems are the wonders of the second machine age.
D.The development of the second machine age needs the financial support from industrialized countries.