Factor Completely $12 a ^ { 4 } - 27 b ^ { 2 }$

Multiple Choice

Factor completely.
- $12 a ^ { 4 } - 27 b ^ { 2 }$

A) $\left( 6 a ^ { 2 } + 9 b \right) \left( 2 a ^ { 2 } - 3 b \right)$
B) $3 \left( 2 a ^ { 2 } + 3 b \right) \left( 2 a ^ { 2 } - 3 b \right)$
C) $3 \left( 2 a ^ { 2 } + 3 b \right) ^ { 2 }$
D) $3 \left( 2 a ^ { 2 } - 3 b \right) ^ { 2 }$