Rewrite as a Single Logarithm $\log _ { b } x ^ { 8 } - 2 \log b \sqrt { x }$

Multiple Choice

Rewrite as a single logarithm. Assume all variables represent positive real numbers.
- $\log _ { b } x ^ { 8 } - 2 \log b \sqrt { x }$

A) $\log _ { b } \left( x ^ { 8 } - x \right)$
B) $\frac { \log _ { b } x ^ { 8 } } { \log _ { b } x }$
C) $\log _ { b } x ^ { 9 }$
D) $\log _ { b } x ^ { 7 }$