Cho hàm số \[y = \ln \sqrt[5]{{\frac{{1 + \sin x}}{{{e^{ - x}}}}}}\]. Tính y '?

\[\frac{{\cos x}}{{5(1 + \sin x)}} - \frac{1}{5}\]

\[ - \frac{{\cos x}}{{5(1 + \sin x)}} - \frac{1}{5}\]

\[ - \frac{{\cos x}}{{5(1 + \sin x)}} + \frac{1}{5}\]

\[\frac{{\cos x}}{{5(1 + \sin x)}} + \frac{1}{5}\]