Simplify the Expression $$\sqrt [ 3 ] { 64 \mathrm { k } ^ { 15 } }$$

Multiple Choice

Simplify the expression. Assume all variables represent positive real numbers.
- $$\sqrt [ 3 ] { 64 \mathrm { k } ^ { 15 } }$$

A) $4 \mathrm { k } ^ { 18 }$
B) $64 \mathrm { k } ^ { 5 }$
C) $- 4 \mathrm { k } ^ { 5 }$
D) $4 \mathrm { k } ^ { 5 }$