$A$ spherical planet far out in space has a mass $M_0$ and diameter $D_0$. $A$ particle of mass $m$ falling freely near the surface of this planet will experience an acceleration due to gravity which is equal to
- A$G M_0 / D_0^2$
- B$4 m G M_0 / D_0^2$
- C$4 G M_0 / D_0^2$
- D$G m M_0 / D_0^2$
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