9. Which of the following best explains how the expansion of feedlots for raising cattle has affected environmental sustainability in rural areas?
a. Concentrating large numbers of farm animals in small spaces has decreased the release of
carbon dioxide in the atmosphere
b. Runoff from animal waste has increased the pollution in local water supplies
C. Feed grains have eliminated potentially harmful invasive plant species from farmland
d. Land development has increased the available water supply for other farming practices
e. Composted manure has introduced valuable nutrients into previously depleted soils