The answer is D. All of the above, as different changes in the environment can lead to many different things.
I’m not sure when you say U.S. but the Republicans supported the idea of state rights. (If you could clarify you question I could help more).
Conflicting ideologies, depression, division of cultural groups, invasion of Poland
Railroads on the Railways required tracks for the trains to run on them these tracks earlier made up of iron for its heavy duty but soon enough realise that iron was not a very good option for tracks. Meaning drawbacks of using iron for example rusting is it was realised that Steel was a better option in making railroads.
Steel being made out of iron is heavy duty material yet it is not much prone to rusting. Just addition of certain minerals and carbon in iron steel forging is done making it heavy duty material.
<span>a revolution from above is more likely to produce liberal democracy</span>
