Which of the Following Best Illustrates the Sustainable Use of a Resource

Which of the following best illustrates the sustainable use of a resource?

A) Coal mines in West Virginia remove the tops of mountains to extract large amounts of coal.
B) Fishing industries improve their methods and now remove more than 90% of the fish in a region.
C) Huge windmills in Texas are able to capture 50% of the wind energy in a specific region.
D) Corporations are converting their company automobiles from gasoline to natural gas, which is a less expensive fossil fuel.