The Table Shows the Quantity of Gold Bars (Qb) in Thousands

The table shows the quantity of gold bars (Qb) in thousands, the extraction cost for each thousand bars (in millions of dollars) , and the user cost of each thousand bars (in millions of dollars) facing the OZ Mining Company this year.Suppose that a new government regulation is going to shut down OZ's mining operation one year from now.Assuming that all gold extracted is sold in the same year (cannot be stockpiled for later sale) , how will the regulation affect
The user cost?

A) It will have no effect on the user cost.
B) The effect on the user cost cannot be determined.
C) The user cost will rise because the rate of extraction will rise.
D) The user cost will become zero because they will not be able to extract in the future.