The founders of the ABCD Corporation believe their idea for a new weight-loss pill will be tremendously successful. ABCD Corporation is currently seeking venture capitalists to invest in their company so they can do further research and hopefully someday develop their idea into a marketable product. This stage of venture capital investing can best be described as:()

A. first-stage.

B. formative-stage.

C. seed-stage.

素有“地球皮肤”之美称的是（）。

A.农田

B.沙漠

C.草原

D.森林