Simplify Assume That Variables Represent Positive Real Numbers $\sqrt [ 5 ] { 1024 x ^ { 10 } y ^ { 20 } }$

Simplify. Assume that variables represent positive real numbers.
- $\sqrt [ 5 ] { 1024 x ^ { 10 } y ^ { 20 } }$

A) $4 x ^ { 5 } y ^ { 15 }$
B) $4 x ^ { 2 } y ^ { 4 }$
C) $1024 x ^ { 2 } y ^ { 4 }$
D) $1024 x ^ { 5 } y ^ { 15 }$