【单选题】In the 1950s, the pioneers of artificial intelligence(AI)predicted that, by the end of this century, computers would be conversing with us at work and robots would be performing our house work. But as...
A.
are capable of reliably recognizing the shape of an object
B.
are close to exhibiting humanlike behavior
C.
are not very different in their performance from those of the 50's
D.
still cannot communicate with people in a human language