During the 1800's, natural resources found in the western part of the United States were overused and at risk of running out. Since the 1800's, the area has worked on responsible development. Which of the following statements best describes responsible development?

A. A material found in nature that people use for their needs.

B. People buy or trade from other regions to meet their needs.

C. There are no restrictions or regulations on the use of natural resources.

D. Balancing the needs of the environment, the community, and the economy.