Rewrite as a Single Logarithm $$( \log b x - \log b y ) + 6 \log b z$$

Multiple Choice

Rewrite as a single logarithm. Assume all variables represent positive real numbers.
- $$( \log b x - \log b y ) + 6 \log b z$$

A) $\log _ { b } \frac { x z ^ { 6 } } { y }$
B) $\log _ { b } \frac { 6 x z } { y }$
C) $\log _ { b } x z ^ { 6 } y$
D) $\log _ { a } \frac { x } { z ^ { 6 } y }$