The correct answer is A) Sandstone Hills.
The region of Oklahoma that is known for having hills with thick forest, cultivating soybeans, having a good oil supply, and being the home of the Tall Grass Praire Reserve is Sandstone Hills.
The Sandstone Hills region is located in North Central Oklahoma is one of the major ecosystems of the region. It goes from the Southern border of Kansas to the Red. It is full of Post Oak Forest. In this region, we can find the Tall Grass Praire that is protected by the Nature Conservancy, a private environmental organization from Arlington, Virginia. This region is also known for having hills with thick forest, cultivating soybeans, and having a good oil supply.
