I would say either A or C, but i'm not positive, my research didn't tell me much, sorry!
I believe it's A: capitalizing on the harsh post-war conditions in their countries.
The Qing Dynasty ruling from 1644 to 1912.
North and South Korea have grown apart as a result of their vastly differing ideologies. North Korea is a communist country with very strict restrictions on the movement of its citizens. The North Korean regime is well-known for its cruelty. South Korea, on the other hand, is a democratic country with an open-market economy. In a nutshell, both North and South Korea have radically different political and economic systems. They have been two nations for over sixty years.