Answer:
D. Trade
Step-by-step explanation:
After Japan was opened up for trade in 1852, it rapidly industrialized and within 50 years was taking on the large European Colonial Empires and China itself. This is due to trade, as it was relatively close to America for East Asia, and had a strategic point as a large island archipelago right off the Asian coast. Another important note is that at this time China was increasingly becoming cut off and anti trade, all at the same time Japan was opening up to the world for trade.