Rewrite the Logarithm as a Ratio of Common Logarithms $\frac { \log x } { \log \frac { 1 } { 7 } }$

Multiple Choice

Rewrite the logarithm as a ratio of common logarithms. ?
Log_1/7 x
?

A) $\frac { \log x } { \log \frac { 1 } { 7 } }$
B) $\frac { \log \frac { 1 } { 7 } } { \log x }$
C) $\log \frac { x } { 7 }$
D) $\log 7 x$
E) None of these