Write the Expression as a Single Logarithm with Coefficient 1 $3 \log _ { m } y - 7 \log _ { m } x ^ { 2 }$

Multiple Choice

Write the expression as a single logarithm with coefficient 1. Assume all variables represent positive real numbers.
- $3 \log _ { m } y - 7 \log _ { m } x ^ { 2 }$

A) $\log _ { m } \left( \frac { 3 y } { 7 x ^ { 2 } } \right)$
B) $\log _ { m } \left( \frac { \mathrm { y } ^ { 3 } } { \mathrm { x } ^ { 14 } } \right)$
C) $\log _ { m } \left( \frac { y ^ { 3 } } { x ^ { 9 } } \right)$
D) $\frac { \log _ { m } \mathrm { y } ^ { 3 } } { \log _ { \mathrm { m } } 14 }$