AlphaGo Zero is _____ of neural networks partly because _____.
a. an especially impressive example // it not only independently learned patterns of play like expert players do, but it went beyond using those patterns
b. adopting new and superior patterns that humans were unaware of an especially impressive example // it can learn to generalize from its training set to novel cases, which is highly unusual for neural networks
c. an example of the limitations of connectionism // it cannot perform as well as a human unless it is programmed to do so by a human who is also an expert at go
d. an example of the limitations of connectionism // it has yet to beat human experts at the game of go