The Indefinite Integral $\int \frac { \sin x } { \cos x } d x$

Multiple Choice

The indefinite integral $\int \frac { \sin x } { \cos x } d x$ is

A) $\ln | \sin x | + C$
B) $\ln | \cos x | + C$
C) $\ln | \cot x | + C$
D) $\ln | \sec x | + C$
E) $\ln | \csc x | + C$