Planet X has mass M and radius R. Planet Y has mass 2M and radius 3R. The gravitational field strength at the surface of planet X is g. What is the gravitational field strength at the surface of planet Y?

 

A. \(\frac{2}{9}g\)

 

B. \(\frac{2}{3}g\)

 

C. \(\frac{3}{2}g\)

 

D. \(\frac{9}{2}g\)