Which is an appropriate layering process for a compost pile?
A. a layer of grass clippings, a layer of fruit scraps, some soil, and some water
B. a layer of dried leaves, a layer of cheese, some soil, and some water
C. a layer of pine needles, a layer of paper napkins, some soil, and some water
D. a layer of paper napkins, a layer of grass clippings, some soil, and some water