Let $y = \log _ { 3 } ( \cot x )$

Multiple Choice

Let $y = \log _ { 3 } ( \cot x )$ Then $y ^ { \prime }$ is

A) $\frac { 1 } { \sin x \cos x \ln 3 }$
B) $- \frac { 1 } { \sin x \cos x \ln 3 }$
C) $\frac { \ln 3 } { \sin x \cos x }$
D) $\frac { 1 } { \sin x \cos x }$
E) $- \frac { \ln 3 } { \sin x \cos x }$