Verified Answer :

meerkat18

The question is asking to choose among the following choices that states the classification system, base on my research and further investigation, I would say that the answer would be letter C. climates. I hope you are satisfied with my answer and feel free to ask for more if you have questions 

PBCHEM

ANSWER: C. climates.

EXPLANATION: The Köppen Classification System is widely used as a classification system for climates. It is introduced in 1900 by the Russian - German climatologist Wladimir Köppen. Climatologist Rudolf Geiger introduced some changes to the classification system in 1954 and 1961 which is why it is also called the Köppen–Geiger climate classification system.