Find the Derivative of the Function $f(u)=e^{u} \cot u$ A) $e^{u}\left(\cot u+\csc ^{2} u\right)$

Multiple Choice

Find the derivative of the function. $f(u) =e^{u} \cot u$

A) $e^{u}\left(\cot u+\csc ^{2} u\right)$
B) $-e^{u} \csc ^{2} u$
C) $e^{u} \csc ^{2} u$
D) $e^{u}\left(\cot u-\csc ^{2} u\right)$