[单选题]
13.34: Which one of th c w 8rdjx0.qbdna:f2vb3 :spci 8//dx x,6 tjj;cu3qte following choices represents the base MKS units for sound intenjq tju;x6 c3,tsity?
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. $\frac{s^2}{m\:kg}$
