It can be inferred that the "contrarians" mentioned in the passage would agree with which of the statement A. The extent of the global warming that occurred between the 1940s and the 1990s has been exaggerated by some climatologists. B. Changes in global temperatures in the 1990s are a part of a trend that is distinct from any trend that may have existed in the 1910s and 1920s. C. Recent changes in global temperature may not be the direct result of human activity.