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Elk have returned to the area, large animals that leave droppings containing seeds and vital nutrients.
A. Elk, large animals that leave droppings containing seeds and vital nutrients, have returned to the area.
B. Elk have returned to the area they are large animals that leave droppings containing seeds and vital nutrients.
C. Elk have returned to the area. To leave droppings containing seeds and vital nutrients.
D. Elk, or large animals, have returned to the area, and they leave droppings containing seeds and vital nutrients.
A. Elk, large animals that leave droppings containing seeds and vital nutrients, have returned to the area.