Factor Completely $50 a ^ { 4 } - 8 b ^ { 2 }$

Multiple Choice

Factor completely.
- $50 a ^ { 4 } - 8 b ^ { 2 }$

A) $\left( 10 a ^ { 2 } + 4 b \right) \left( 5 a ^ { 2 } - 2 b \right)$
B) $2 \left( 5 a ^ { 2 } + 2 b \right) ^ { 2 }$
C) $2 \left( 5 a ^ { 2 } - 2 b \right) ^ { 2 }$
D) $2 \left( 5 a ^ { 2 } + 2 b \right) \left( 5 a ^ { 2 } - 2 b \right)$