[单选题]
Two masses M and m are connected by a rod of s3cqh,: p7k dcbp x. ik1j:e+uj7z)y+ 3hoxofneag 9)k 6kvfb8 428tamkjv)dj ggligible mass. They rotate around a vedkma2ag) k8vv 94t ) gkf8jbj6rtical 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. ${L^2(M+4m)}$
