A Conservation Biologist Is Promoting the Preservation of a Wilderness

A conservation biologist is promoting the preservation of a wilderness site that includes a stand of old-growth forest.She emphasizes the age of the trees and the importance of preserving this ancient ecosystem for future generations.She states that "it is the right thing to do." This scientist is arguing that biodiversity (as exemplified by this ancient forest) is important because

A) it provides people with ecosystem goods and services.
B) it provides people with psychological and aesthetic benefits.
C) its loss deprives scientists of the chance to study and better understand ecosystems.
D) humans have an ethical obligation to work for conservation and against extinction.
E) humans might be able to profit economically from the forest if it is preserved.