Write the Expression in Radical Form $x ^ { 7 / 3 }$

Multiple Choice

Write the expression in radical form. Assume that all variables represent positive real numbers.
- $x ^ { 7 / 3 }$

A) 7 x3
B) $\sqrt [ 5 ] { x ^ { 7 } }$
C) $\sqrt [ 4 ] { x ^ { 7 } }$
D) $\sqrt [ 4 ] { x }$