Read this excerpt from an informative report by the US Department of Agriculture. Which sentence best supports the main idea that the initiative aims to prevent water contamination? The Illinois River/Eucha-Spavinaw Watershed Initiative is a joint landscape program between Arkansas and Oklahoma to improve water quality from agricultural sources. The initiative was approved in October of 2010, and outreach activities began immediately after. Causes of the water quality problems in this area have been identified by the US Geological Survey as high concentrations of nitrogen, phosphorus, sediments, and bacteria. Potential sources of these degrading agents are runoff from land surfaces, application of animal manure and litter as fertilizer on pastures and hay land, and resuspension of streambed sediments. Poultry production and other livestock farming operations are dominant within the two watersheds.​