Find the Sum or Difference $2 x ^ { 2 } \left( 6 x ^ { 6 } + 4 x ^ { 4 } \right)$

Multiple Choice

Find the sum or difference.
- $2 x ^ { 2 } \left( 6 x ^ { 6 } + 4 x ^ { 4 } \right)$

A) $12 x ^ { 12 } + 8 x ^ { 8 }$
B) $12 x ^ { 8 } - 8 x ^ { 6 }$
C) $12 x ^ { 8 } + 8 x ^ { 6 }$
D) $12 x ^ { 8 } + 4 x ^ { 4 }$