The correct answer is D) resource conservation and land preservation.
The goal in which John Muir was most interested in was resource conservation and land preservation.
John Muir (1838-1914) was a Scottish environmentalist that emigrated to the United States when he was 11 years old. He was a lover of nature and founded the Sierra Leone Club, to support the protection of natural parks in America. He made great efforts to create Yosemite Park and Sequoia National Park, urging the federal government to create the proper legislation for the conservation of natural areas.