Given below are four sentences, three of which, are jumbled. Pick the option that gives the correct order.
A. There was a ceremony in which South and North Korean roads and railways were connected.
B. South Korea believes that this shows that the countries are willing to work together on rail and road modernization.
C. The event was symbolic, but it is another step toward peace.
D. South Korea said that the construction will go on while North Korea is closely watched.