Write the Expression Using Rational Exponents $\sqrt [ 6 ] { x ^ { 4 } }$

Multiple Choice

Write the expression using rational exponents. Then simplify and convert back to radical notation. $\sqrt [ 6 ] { x ^ { 4 } }$

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