B because during the 1200s and 1300s, the Mongol took over most of Afro-Eurasia. It was unexpected because they were a nomadic group.
A is wrong because serfdom implies the feudal system only seen in Europe and Feudal Japan.
C is wrong because the European Crusaders pretty lost every Crusade to the Muslims. The outcome of the Crusades were Europe's increased interest in Islamic goods.
D is wrong because the Byzantine Christians didn't do the Crusades, the Holy Roman Empire did.
the cost of the printing press
The ease in which the colonists could improve their social status depended upon transportation and money.
<span>Reject Martin Luther's demand. It was a lot of wars between the Catholic's and Protestant forces/</span>
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