How, in Aldo Leopold's Ethics, Are Right Actions to Be

How, in Aldo Leopold's ethics, are right actions to be distinguished from wrong ones?

A) Right actions ensure the continuity of the natural world for future generations; wrong actions rob them of that inheritance.
B) Right actions act in such a way that all members of the biotic community could will them simultaneously; wrong actions use some members as means.
C) Right actions tend to preserve the stability and beauty of nature; wrong actions tend to do otherwise.
D) Right actions preserve nature as a productive resource for valuable ends; wrong actions destroy it.