Its B i think because i don't know this much or that i'm right....
Answer: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:
Create the League of Nations , however America didn’t join but 42 countries did
Realised that the physical and chemical properties of elements were related to their atomic mass in a 'periodic' way, and arranged them so that groups of elements with similar properties fell into vertical columns in his table.