What is Leopold’s idea of “land ethic”?

What is Leopold’s idea of “land ethic”?
A) People should tackle nature as something to overcome or defeat; land is something to subdue and settle.
B) People should come together to make decisions about how land should be used. They should vote.
C) People should not view nature as something to overcome or defeat. They should care about land.
D) People should follow their customs and local religions when it comes to their view of treating the land.