Expand into a Sum And/or Difference of Logarithms $\log \left( \frac { x } { y } \right)$

Multiple Choice

Expand into a sum and/or difference of logarithms. Assume all variables represent positive real numbers. $\log \left( \frac { x } { y } \right)$

A) $\log x + \log y$
B) $\log x \cdot \log y ^ { - 1 }$
C) $\log x - \log y$
D) $\frac { \log x } { \log y }$