Express as the Logarithm of a Single Expression $\log _ { 9 } 6 + \log _ { 9 } 5 - \log _ { 9 } 10$

Multiple Choice

Express as the logarithm of a single expression. Assume that variables represent positive numbers.
- $\log _ { 9 } 6 + \log _ { 9 } 5 - \log _ { 9 } 10$

A) $\log _ { 9 } \frac { 30 } { 10 }$
B) $\log _ { 9 } 3$
C) $\log _ { 9 } 1$
D) $\log _ { 9 } \frac { 1 } { 3 }$