Use the Product Rule to Multiply $$\sqrt [ 4 ] { 16 } \cdot \sqrt [ 4 ] { 256 n ^ { 4 } }$$

Multiple Choice

Use the product rule to multiply. Assume all variables represent positive real numbers.
- $$\sqrt [ 4 ] { 16 } \cdot \sqrt [ 4 ] { 256 n ^ { 4 } }$$

A) $6 n$
B) $- 2 n$
C) $- 8 n$
D) $8 n$