Slaves and peasants were dying quickly and vastly caused a high loss of work for the upperclass civilians... the peasants could go on "stike". They were able to demand more turning the system on its head.
It would be "C.The agricultural sector boomed because of the high demand for food caused during the war, but fell into depression when that demand caved after the war" that was not <span>a serious economic problem undermining the world's economic stability after World War I, since in fact the agricultural sector was struggling a great deal. </span>