What Is the Current Status of Attempting to Mend the Brain

Multiple Choice

What is the current status of attempting to mend the brain with computer chips?

A) There has been some success with monkeys,indicating that the computer chip was able to act as a central pattern generator.
B) A US-Canadian team designed an artificial network on a chip that enabled paralyzed cats to walk again.
C) Several computer chip devices have been developed to compensate for nervous system damage in humans;they are in clinical trials now.
D) None of the attempts have produced any change in function in either animals or humans.