Question

a result of the nuremberg trials was that the united nations
moved to protect war criminals more carefully.
left prosecution of war criminals up to each country.
prevented anyone from using nazi symbols in the future.
established that genocide was an international crime.

Explanation:

The Nuremberg Trials were held to prosecute Nazi war criminals after World War II. One of the key outcomes was the establishment of genocide as an international crime. It did not aim to protect war - criminals, nor did it leave prosecution solely to each country. Also, preventing the use of Nazi symbols was not the main result.

Answer:

established that genocide was an international crime.