How are the Koppen climate system, environmental determinism, and possibilism related?

How are the Koppen climate system, environmental determinism, and possibilism related? A. Köppen refuted possibilism in developing his climate system, establishing environmental determinism, the view that humans are inexorably shaped by the physical environment.

B. The study of climate, using these three complementary models, has allowed geographers to study climate change more extensively than ever before.

C. Köppen’s climate system facilitated the study of human interaction with the environment, and possibilism replaced environmental determinism as the dominant model.

D. Köppen accurately identified 24 distinct climate regions and established possibilism, replacing environmental determinism.

E. Köppen developed his system to support more efficient agricultural practices, but his model has been used by possibilists, critics of sustainability.

I think the answer is A, but I'm not quite sure?