Premise: The Arkansas Mountain AVA is an American Viticultural Area located in the Ozark Mountains of northwestern Arkansas. It is part of the larger Ozark Mountain AVA, which also includes regions in Missouri and Oklahoma. The smaller Altus AVA is entirely contained within the Arkansas Mountain AVA. The Arkansas Mountain AVA includes 2880000 acre , making it the ninth largest AVA as of 2008.
Hypothesis: The Arkansas Mountain AVA is the largest natural area in Arkansas.