Express as the Logarithm of a Single Expression $$\log _ { 6 } 9 - \log _ { 6 } x$$

Multiple Choice

Express as the logarithm of a single expression. Assume that variables represent positive numbers.
- $$\log _ { 6 } 9 - \log _ { 6 } x$$

A) $\log _ { 6 } ( 9 - x )$
B) $\log _ { 6 } \frac { x } { 9 }$
C) $\log _ { 6 } \frac { 9 } { x }$
D) $\log _ { 12 } \frac { 9 } { x }$