Simplify Assume That All Variables Represent Positive Real Numbers $$\sqrt [ 3 ] { 343 x ^ { 4 } y ^ { 5 } }$$

Multiple Choice

Simplify. Assume that all variables represent positive real numbers.
- $$\sqrt [ 3 ] { 343 x ^ { 4 } y ^ { 5 } }$$

A) $3 x y \sqrt [ 3 ] { x y ^ { 2 } }$
B) $7 x y \sqrt { x y ^ { 2 } }$
C) $7 x y \sqrt [ 3 ] { x y ^ { 2 } }$
D) $7x y \sqrt [ 3 ] { x y }$