[单选题]
Two masses M and m are connecx*,pc2ii k vnv0kd1;lted by a rod of negligible mass. They rota * m -ggoxs7*fmk*t5fwhrc ;s8te around *o*tggsc7 mr-h8;5mfw* sfx ka vertical axis as shown in the diagram.
The ratio
$frac{Distance between M and the axis}{Distance between m and the axis}$=$frac{1}{2}$
What is the moment of inertia?
A. $frac{L^2(M+m)}{4}$
B. $frac{L^2(M+m)}{9}$
C. ${L^2(M+m)}$
D. ${L^2(M+4m)}$
