In 1917, the Russian Revolution overthrew the tsar and contributed to Russia’s exit from the war.
A. Unrestricted Submarine Warfare.
This caused Germans to attack vessels that carried US citizens, bringing the US into the war.
<span>The pros of the industrial revolution were that wealth increased overall, more people entered the middle class and quality of living increased for everyone as a result of technology. The cons include pollution, accidental death and overpopulated cities.</span>
