The correct answer is C. signed a final peace treaty.
1. North and South Korea have never signed a final peace treaty to formally end the Korean War.
2. The Korean Armistice Agreement in 1953 only resulted in a ceasefire, not a permanent peace agreement.
3. This means that technically, North and South Korea are still at war, even though active fighting has ceased.
4. The absence of a peace treaty has contributed to the ongoing tension and division between the two countries.
