Find the Perimeter $\left( x ^ { 2 } + 8 x + 4 \right)$

Multiple Choice

Find the perimeter.
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A) $\left( x ^ { 2 } + 8 x + 4 \right)$ units
B) $\left( x ^ { 4 } + 8 x ^ { 2 } + 4 \right)$ units
C) $\left( 4 x ^ { 2 } + 16 x + 8 \right)$ units
D) $\left( x ^ { 4 } + 16 x ^ { 2 } + 8 \right)$ units