Which of the following best describes the most reasonable prediction of how soil composition might change with depth? A. Weathered rock will only be found in the topmost layer of soil, with no rock material at greater depths.

B. Soil will contain more organic material nearer the surface and less organic material farther down.

C. Most of the plant and animal material in the soil will be found at a greater depth.

D. The weathered rock near the surface will be composed of larger fragments, with smaller fragments farther down.