Perform the Indicated Operation $\frac { 100 x + 300 } { x ^ { 2 } + 8 x + 16 }$

Multiple Choice

Perform the indicated operation. Simplify if possible.
-Express the perimeter of the rectangle as a fully simplified rational expression.

A) $\frac { 100 x + 300 } { x ^ { 2 } + 8 x + 16 }$ in.
B) $10 \mathrm { in }$ .
C) $20 \mathrm { in } .$
D) $10 \mathrm { x }$ in.