The user cost of extracting a nonrenewable resource is:

A) inversely related to how much of the resource remains.
B) directly related to how much of the resource remains.
C) unrelated to how much of the resource remains.
D) inversely related to the expected future price of the resource.

The user cost of extracting a nonrenewable resource is the opportunity cost of using a resource now rather than preserving it for the future. As the resource becomes scarcer, the user cost increases because it becomes more expensive to extract the remaining resource, and the opportunity cost of using the resource now rather than preserving it for future use increases. Therefore, the user cost is inversely related to how much of the resource remains.