<Li> Panama ship seizure </Li> <Ul> <Li> 2017--18 North Korea crisis </Li> </Ul> <Li> 2017--18 North Korea crisis </Li> <Ul> <Li> Hwasong missile tests </Li> </Ul>

Which labeled area on the map is known as the demilitarized zone (dmz) a) 1 b) 2 c) 3 d) 4