To determine in which state more than 100 billion tons of coal were mined in 2005, we need to carefully examine the data provided in the chart for each state:
1. West Virginia: 37 billion tons
2. Wyoming: 68 billion tons
3. Montana: 120 billion tons
4. Illinois: 78 billion tons
We are looking for a state where the amount of coal mined exceeds 100 billion tons. Let's analyze each state's data:
- West Virginia mined 37 billion tons. This is less than 100 billion tons.
- Wyoming mined 68 billion tons. This is also less than 100 billion tons.
- Montana mined 120 billion tons. This amount is greater than 100 billion tons.
- Illinois mined 78 billion tons. This is less than 100 billion tons.
From this analysis, we can see that the state where more than 100 billion tons of coal were mined in 2005 is Montana.
Therefore, the correct answer is:
Montana
