Mining companies in Marsland can sell mineral Hydranite in Venusland at a price that is below the cost to Venusland mining companies of quarrying it. To help those Venusland mining companies, the Venusland administration plans to set a minimum selling price in Venusland for Hydranite mined in Marsland that is twenty percent greater than the average quarrying cost for mining companies in Venusland.
Which of the following, if true, most seriously threatens the success of the plan?
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