Rewrite Using the Power Rule $\log _ { b } y ^ { 9 }$

Multiple Choice

Rewrite using the power rule. Assume all variables represent positive real numbers.
- $\log _ { b } y ^ { 9 }$

A) $b \log _ { 9 } y$
B) $9 \log _ { b } y$
C) $9 \log _ { b } \mathrm { y } ^ { 9 }$
D) b $\log _ { 90 } \mathrm { y } ^ { 9 }$