Answer:
b, a
Explanation:
a quick google search found me the answers
Constrained i hope this helps :)
The main reason why the US joined the war was because multiple attack on passenger and merchant ships with submarine attacks .The final straw was when the RMS Lusitania by a German u-boat going to Liverpool England .
The Mongols only built up Russian cities that were deemed vitally important. <span>was the pattern of Mongol settlement in Russia and that is the correct statement,</span>
