A: Arkansas River Valley
Explanation:
The Arkansas River Valley also known as River Valley is a region in Arkansas in which Arkansas River flows, in the western part of the state. It is best known for its farming activities and as the area that lies in between the Ozark and Ouachita Mountains.
River Valley is well known for its features such as flat lowlands covered in fertile farmland and lakes periodically interrupted by high peaks.
It is highly prone to flood most especially in the Forth smith area.
Among the options given on the question option C is the best choice.
High economic growth rates.
Explanation: When a country's population is attacked with an infectious disease like malaria there are many effects. The health care costs of the government goes high as the people get affected more. On the other hand due to the sickness many people could not attend to their workplace .So there is a higher absent rate in the work place. Children are most vulnerable for disease like malaria. So infant mortality rate goes high for the disease. But high economic growth is not likely to be the effect of a disease like malaria.