His stories established a "moral code for robots and their relationship with humans".
Answer: D
Explanation
Isaac is famous first because of his invention of the robotic books of law.
Being a renowned fiction writer, he had published his major works and was broadly used.
The books eased technology and made science accessible as well as more understanding.
Second, the view of robots by Isaac was highly influential as they significantly contributed to the prediction of the public culture through their profusion.
Therefore he created a good relationship between human and robots.
