2. the reasons for South Korea's economic success and recent downturn.

Some reasons for South Korea's economic success are electronics, automobiles, telecommunications, shipbuilding, chemicals and steel. The reason for the recent downturn is because, South Korea has an export driven economy so the trade-war going on between Beijing and Washington is negatively affecting the electronic and telecommunication industry which is were most of South Korea's economic stability came from. Right now, South Korea is facing one of its worst two year growth periods in more than half a century

Explanation:

c. the passage of the fifteenth amendment