Express as the Logarithm of a Single Expression $\log _ { 7 } ( x - 6 ) - \log _ { 7 } ( x + 2 )$

Express as the logarithm of a single expression. Assume that variables represent positive numbers.
- $\log _ { 7 } ( x - 6 ) - \log _ { 7 } ( x + 2 )$

A) $\log _ { 7 } \frac { x - 6 } { x + 2 }$
B) $\log _ { 7 } - 8$
C) $\log _ { 7 } \frac { x - 6 } { x - 2 }$
D) $\log _ { 7 } \left( x ^ { 2 } - 4 x - 12 \right)$