Simplify the Expression $$\sqrt [ 3 ] { 64 a ^ { 12 } b ^ { 6 } }$$

Multiple Choice

Simplify the expression. Assume that all variables represent positive real numbers. $$\sqrt [ 3 ] { 64 a ^ { 12 } b ^ { 6 } }$$

A) $61 a ^ { 9 } b ^ { 3 }$
B) $2 a ^ { 3 } b ^ { 3 }$
C) $- 4 a ^ { 4 } b ^ { 2 }$
D) $4 a ^ { 4 } b ^ { 2 }$