The mass of Earth is ${M_{\text{E}}}$, its radius is ${R_{\text{E}}}$ and the magnitude of the gravitational field strength at the surface of Earth is $g$. The universal gravitational constant is $G$. The ratio $\frac{g}{G}$ is equal to

A.     $\frac{{{M_{\text{E}}}}}{{R_{\text{E}}^2}}$

B.     $\frac{{R_{\text{E}}^2}}{{{M_{\text{E}}}}}$

C.     ${M_{\text{E}}}{R_{\text{E}}}$

D.     1

A