The main reason that would make a country to end its participation in a war because it has become immoral is the presence of war crimes.
<h3>What are War Crimes?</h3>
This refers to the inhumane actions that a person or soldier, usually fighting in a foreign country metes out on people, such as unprovoked aggression, extra-judicial killings, genocide, etc
Hence, we can see that the presence of war crimes is the main reason why a country would pull out of a war and claims it is immoral as this would have infringed on human rights.
Read more about war crimes here:
brainly.com/question/1550237
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You've only written one answer in the multiple choice, it happens to be the right one anyways so:
<span>"through the fourteen points the league of nations treaty of versailles"</span>
Explanation:
The difference between a confederal system and a federal system is that each confederation member state is the holder of supreme power while the federal units in a federal state have no power, given the fact that sovereignty is exclusively vested in the federal state.