Find the Integral Using an Appropriate Trigonometric Substitution $\int \frac{1}{x^{2} \sqrt{x^{2}+25}} d x$

Multiple Choice

Find the integral using an appropriate trigonometric substitution. $\int \frac{1}{x^{2} \sqrt{x^{2}+25}} d x$

A) $-\frac{\sqrt{x^{2}+25}}{5 x}+C$
B) $\frac{\sqrt{x^{2}+25}}{5 x}+C$
C) $\frac{\sqrt{x^{2}+25}}{25 x}+C$
D) $-\frac{\sqrt{x^{2}+25}}{25 x}+C$