Shade in the american prairie as it was in the 1800s on this map, or use the space below the map to describe the location of the american prairie as it was in the 1800s. since i can't shade anything in on the map could you guys describe the location ?

In the 1800s the prairie extended from north to south of the United States, encompassing the states of Montana, North Dakota, Texas (half only), Oklahoma, Kansas, Nebraska, Iowa, Illinois, Missouri, and South Dakota, Minnesota, Wyoming, Colorado, New Mexico

d) in the state of iowa