Which statement about topsoil is correct?
A. Topsoil is a renewable resource but, since the renewal process is very slow, topsoil is easily depleted by human actions.
B. Topsoil is a nonrenewable resource because the renewal process takes several million years.
C. Topsoil is a renewable resource but, since the renewal process is very fast, it is rarely depleted by human actions.
D. Topsoil is composed mainly of immature soils with some young soils.
Answer: A
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