$\text { Find the integral } \int \frac { 15 } { 2 \sqrt { x } ( 1 + x ) } d x \text {. }$

Multiple Choice

$\text { Find the integral } \int \frac { 15 } { 2 \sqrt { x } ( 1 + x ) } d x \text {. }$

A) $\frac { 30 } { \arctan ( \sqrt { x } ) } + C$
B) $15 \arctan ( \sqrt { x } ) + C$
C) $\frac { 15 } { 2 \arctan ( \sqrt { x } ) } + C$
D) $\quad 30 \arctan ( \sqrt { x } ) + C$
E) $\frac { 15 } { \arctan ( \sqrt { x } ) } + C$