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Which of the following is TRUE about the improved use of rangelands in the western United States since the 1990s?

A

Rotational grazing is used so cattle do not damage sensitive vegetation near riparian areas, thus protecting watersheds.

B

Cattle are confined in animal feeding operations for the purpose of protecting rangelands for other species such as pigs.

C

Controlled burns are regularly conducted to limit the spread of native grasses and wildflower species.

D

New species of highly productive grasses such as cheatgrass and sagebrush have been developed to replace native grasses that are less productive.

E

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.

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