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Which of the following is TRUE about the improved use of rangelands in the western United States since the 1990s?
Rotational grazing is used so cattle do not damage sensitive vegetation near riparian areas, thus protecting watersheds.
Cattle are confined in animal feeding operations for the purpose of protecting rangelands for other species such as pigs.
Controlled burns are regularly conducted to limit the spread of native grasses and wildflower species.
New species of highly productive grasses such as cheatgrass and sagebrush have been developed to replace native grasses that are less productive.
Increased irrigation has allowed more robust plant species to grow in semi-arid regions, thus increasing the area of land that is useful as rangeland.