[单选题]
The intensity at a distance of 6.0 m from d 37 ckl/pzs;qo7gsh,a s dvkzrr9(y:9wource that is radiating equally in y9z rd(v:rwk9all directions is $6.0 \times 10^{-10} \; W/m^{2}$. What is the intensity level in dB?
A. $18 \; dB$
B. $23 \; dB$
C. $28 \; dB$
D. $32 \; dB$
