Write the Expression as a Single Logarithm with Coefficient 1 $a \neq 1 \text { and } b \neq 1$

Multiple Choice

Write the expression as a single logarithm with coefficient 1. Assume all variables represent positive real numbers with $a \neq 1 \text { and } b \neq 1$ .
- $$\left( \log _ { a } x - \log _ { a } y \right) + 5 \log _ { a } z$$

A) $\log _ { a } \left( \frac { x z ^ { 5 } } { y } \right)$
B) $\log _ { a } \left( \frac { 5 x z } { y } \right)$
C) $\log _ { a } \left( x + z ^ { 5 } - y \right)$
D) $\log _ { a } \left( \frac { x } { z ^ { 5 } y } \right)$