Expand a Ssume That All Variables Represent Positive Real Numbers $\log _{\mathrm{b}} \mathrm{yz}^{9}$

Multiple Choice

Expand. A ssume that all variables represent positive real numbers.
- $\log _{\mathrm{b}} \mathrm{yz}^{9}$

A) $\log _{b} y+\log _{b} 9 z$
B) $9 \log _{b} y+9 \log _{b} z$
C) $9 \log _{\mathrm{b}} \mathrm{yz}$
D) $\log _{b} y+9 \log _{b} z$