Find the Derivative Of $\ln \left[ \left( \ln x ^ { 6 } \right) ^ { 7 } \right]$

Multiple Choice

Find the derivative of $\ln \left[ \left( \ln x ^ { 6 } \right) ^ { 7 } \right]$ .

A) $\frac { 42 } { x \ln x }$
B) $\frac { 42 } { \ln ( \ln x ) }$
C) $\frac { 7 } { x \ln x }$
D) $\frac { 42 } { x + \ln x }$