Which Korean War outcomes are still in place today?

Responses
A The U.N. gave Russia power over North Korea, and U.S. troops left South Korea.The U.N. gave Russia power over North Korea, and U.S. troops left South Korea.
B North and South Korean leaders signed a treaty, and North Korea became a democracy.North and South Korean leaders signed a treaty, and North Korea became a democracy.
C North and South Korea became one country, and North/South military joined together.North and South Korea became one country, and North/South military joined together.
D Korea is divided into North/South countries, and U.S. troops offer support in South Korea