Write the Expression Using Only the Indicated Logarithms $\log _ { 1 / 4 } ( a - b )$

Multiple Choice

Write the expression using only the indicated logarithms.
- $\log _ { 1 / 4 } ( a - b )$ using natural logarithms

A) $\frac { \ln ( a - b ) } { \ln 4 }$
B) $\frac { 1 } { \ln 4 }$
C) $\frac { \ln 4 } { \ln ( a - b ) }$
D) $- \frac { \ln ( a - b ) } { \ln 4 }$