Each December 31 in Country Q, a tally is made of the country's total available coal supplies—that is, the total amou...
Elizabeth25April 15, 2024
trying to understand why d is wrong
is see how a is right but I don't see how d is wrong. If in both years they mined the same amount, then it could be true that in 1991 more coal was consumed. I know I'm missing something just can't quite catch it.
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I think that A is the right answer here. We are told that the measurement reflects the change in (amount mined - amount used), and that there are no exports. This means that if there was a decrease in the stock of coal, the last year must have seen more use than mining.
D is wrong because it only covers half of the equation. It's possible that the amount used actually fell, if the amount mined fell by an even greater amount.
