Iron ore. It is used to create steel, and of the top three iron ore companies in the world two are in Australia.
I believe the answer is: <span>purchasing days determined by license plate numbers
At that time, the Gasoline reserve was in an extremely high demand while its production was still extremely limited.
To handle this, the government divide the purchasing right based on the end number of license plate. (odd numbers could buy at day X while even numbers could buy it at day Z) </span>
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B the third estate resented their taxes, poverty, and lacking access to bread and other common goods.
https://www.thecanadianencyclopedia.ca/en/article/federalism/