Perform the Operations and Simplify the Result When Possible $\frac { 5 } { x ^ { 2 } - 3 x - 4 } - \frac { x } { 3 x ^ { 2 } - 10 x - 8 }$

Multiple Choice

Perform the operations and simplify the result when possible. $\frac { 5 } { x ^ { 2 } - 3 x - 4 } - \frac { x } { 3 x ^ { 2 } - 10 x - 8 }$

A) $\frac { - x ^ { 2 } + 14 x + 10 } { ( x - 4 ) ( x + 1 ) ( 3 x + 2 ) }$
B) $\frac { x ^ { 2 } + 14 x + 10 } { ( x - 3 ) ( x + 1 ) ( 3 x + 2 ) }$
C) $\frac { - x ^ { 2 } + 14 x + 10 } { ( x - 4 ) ( x + 1 ) \left( 3 x ^ { 2 } - 7 x - 6 \right) }$
D) $\frac { - x ^ { 2 } + 14 x + 10 } { ( x + 1 ) ( 3 x + 2 ) }$
E) $\frac { - x ^ { 2 } + 10 x + 10 } { ( x - 4 ) ( x + 1 ) ( 3 x + 2 ) }$