[单选题]
13.34: Which one of the following choices represents t 4afmcn, *zub-he base MKS u xx 2zrn*5xa)o 2uatt(nits for sounxta)2 uor2a5xxz* nt(d intensity?
A. $\frac{kg}{s^3}$
B. $\frac{m}{kg\:s^3}$
C. $\frac{m^2}{kg\:s^2}$
D. $\frac{kg}{m\:s^2}$
E. $\frac{s^2}{m\:kg}$
