the answer is C. a desire to get rid of the foreign Mongol rulers.
Explanation:
Many problems arose with other nations, during Ming Period. The first thing is that the encounters in battles with the Mongols were almost incessant, since they were ruling a period of time. It is for this reason that one of the first and main achievements was sending the Mongolian rulers fleeing and announcing the Ming Dynasty. He captured Beijing in 1368, destroying the palaces, which was he's ultimate quarry.
they needed more raw materials to fuel their mass production and population growth. they would exploit natural resources and fight for what they could get. if that makes any sense