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Answer:</em></u></h3>
It is known as Eastern Siberia, and please ask environment and geo questions in geography.
Military leaders were not prepared for the trench warfare of world war i, in which:
ANSWER: 4th Choice: opposing forces fought each other from elaborate systems of trenches without much loss or gain of land.
Hope this helps! :)
A. Life-sustaining would be the answer
Foreign country I believe