Is this a true or false question? If it is, then the answer is true.
"If the ruling dynasty was wealthy, it would keep the Mandate of Heaven" is the best answer from the list, but it should be noted this was not always the case.
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<em>What forms the boundary between the North Central Plains and the Coastal Plains?</em>
Answer:
Hi, There!
The Correct Answer Is option C Or Caprock Escarpment!
Hope this Helps!!

The answer to your question is
I'd say the combustion engine, even though it was toyed with in the mid-west during the cowboy era, it wasn't until after the Civil War in which it was a fully effective gasoline powered engine.