Critical Reasoning (CR) | QOTD: Twenty years ago, Balzania put in place

IMO

Surface mining + Underground mining = Total coal that the mine produced

Reclamation cost comes from only surface mining (as it destroys land surface)

So Average reclamation cost (for a surface coal mine being reclaimed today) per ton of coal that the mine produced is based on
Surface/(Surface+Underground)

Only way for the average to be reduced is to decrease in mix (percentage) of Surface mining or it's a increase in mix of Underground mining

Look at the answer choices, Only C. and E.
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