They developed a written language.
The cost of the 2009 missile launch of North Korea,
according to South Korea is 300 million. There are two rounds of missile tests
of North Korea were conducted in the year 2009. North Korea or the Democratic
People’s Republic of Korea (DPRK) launched seven short-range missile into Japan’s Sea which is also the East Sea of
Korea.
Try to check google or something
The answer is c.
Hope this helps the other guy did not answer correctly just typed a bunch of numbers and letters
