The correct answer is (c), Mississippi Plains.
Tornado Alley is a region in the Southern and Central United States where tornadoes are most frequent. It is roughly defined as the area from central Texas northward through the Great Plains to the Canadian border, and eastward to the Mississippi River.
The Atlantic Seaboard is the eastern coastal region of the United States. It is a densely populated area with a long history of human habitation. The Pacific Coast is the western coastal region of the United States. It is a less densely populated area with a shorter history of human habitation. Alaska is a state in the northwestern corner of North America. It is the largest state in the United States by area, but it is also the least populous.
The Mississippi Plains are a region in the central United States. They are a flat, fertile area that is home to a large number of farms. The region is also known for its tornadoes.