Given below are four jumbled sentences. Select the option that gives their correct order.
A. Then, they spread as the unmined coal starts burning with oxygen drawn from pores and mine shafts.
B. An entire township- Jharia is to be relocated because of the uncontrollable underground fires.
C. These fires start mostly from burning trash close to coal pits.
D. This is a grave threat as poisonous fumes of carbon monoxide rise up from underground fires.