Use Rational Exponents to Simplify the Following $\sqrt [ 4 ] { 16 x ^ { 2 } }$

Multiple Choice

Use rational exponents to simplify the following.
- $\sqrt [ 4 ] { 16 x ^ { 2 } }$

A) $16 \mathrm { x } ^ { 1 / 2 }$
B) $2 x ^ { 1 / 2 }$
C) $2 x ^ { 1 / 4 }$
D) $2 x ^ { 2 }$