- Wed Jan 25, 2023 1:02 pm
The first sentence in the stimulus states that each Dec. 31, Country Q makes a tally of the total available coal supply. This is basically what you'd think a total available coal supply would mean, i.e. all of the coal that the country has available based on all of the prior years of mining that hasn't already been used.
To pick a number, let's say that Country Q had 10,000 tons of coal at the end of 1990.
Then during 1991, Country Q (presumably) mined some more coal and also consumed some of their coal, but we don't know exactly how much they mined or how much they consumed.
What we do know is that at the end of 1991, the total available coal was considerably less than at the end of 1990. Let's say Country Q now has 3,000 tons of coal available, just to pick a number that would qualify as "considerably less."
Since Country Q doesn't import or export any of its coal (which would be other possible explanations for the change in the amount of coal), the only way that the overall total of available coal would go down from the end of 1990 to the end of 1991 is if Country Q consumed more than it mined in 1991 (Answer B). Using our example above, maybe Country Q mined 5,000 tons but consumed 12,000 tons, for a net loss of 7,000 tons, leaving 3,000 tons remaining. Of course, this is just one possibility, but it shows the idea.