Final answer:
The subject of this question is a coal mine. In 2006, an explosion in a coal mine in Sago, West Virginia led to 12 fatalities.
correct answer is a
Step-by-step explanation:
The subject of this question is a coal mine.
In 2006, there was an explosion in a coal mine in Sago, West Virginia which resulted in the death of 12 people.
Coal mining can be a dangerous occupation, as it carries the risk of accidents and health hazards for miners.
correct answer is a