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 a series of military tribunals held by the Allied forces after World War II. One of the significant outcomes was the establishment of genocide as an international crime, which set important legal precedents for international law. It did not move to protect war - criminals more carefully, nor did it leave prosecution solely to each country. Also, it did not prevent the use of Nazi symbols as its main result.

Answer:

established that genocide was an international crime.