Simplify the Expression $$\sqrt [ 3 ] { \sqrt { 49 } }$$

Multiple Choice

Simplify the expression. Assume all variables represent positive real numbers.
- $$\sqrt [ 3 ] { \sqrt { 49 } }$$

A) $\sqrt [ 3 ] { 7 }$
B) 7
C) $\sqrt { 7 }$
D) $\sqrt [ 5 ] { 49 }$