Evaluate the Integral $\int \operatorname { coth } ( 9 x ) d x$

Multiple Choice

Evaluate the integral.
- $\int \operatorname { coth } ( 9 x ) d x$

A) $\frac { 1 } { 9 } \ln | \sinh 9 x | + C$
B) $\ln | \sinh 9 x | + C$
C) $\frac { 1 } { 9 } \operatorname { csch } ^ { 2 } 9 x + C$
D) $9 \ln \left( \sinh \frac { x } { 9 } \right) + C$