Answer: D is right.
Explanation: during Theodor Roosevelt´s presidential mandate Giffort Pinchot became responsible for American forestry. Already in 1880s Americans became increasingly aware of importance of enviroment protection and protection of their forests. In 1881 Congress created department of forestry with ministry of agriculture. President Roosevelt was a president who took a closer look at all this and did not want to permit any destrution of natural resources. It was him who named Pinchot to his function. Pinchot was supposed to be a guarantee of highly qualified and scientific protection and use of natural resources, forests especially.