Great Controversy Exists Regarding the "Hobbits" of Flores Island

Great controversy exists regarding the "hobbits" of Flores Island. Which of the following arguments would not support the hypothesis that hobbits are the same species as modern humans?

A) The different structure of the wrist bones found on Flores Island is an example of the level of nature variation exhibited by Homo sapiens.
B) Reconstructions of the hobbit brain show that it has unique structural features not seen in the brains of modern humans.
C) Modern populations of human pygmies of approximately the same size as the Flores hobbits exist on islands in the Philippines.
D) The island of Flores has never been isolated from other human populations by enough distance to prevent gene flow.