Rewrite the Radical Expression Using Rational Exponents $\sqrt[8]{m^{7}}$ A) $m^{7 / 8}$

Multiple Choice

Rewrite the radical expression using rational exponents. A ssume all variables represent nonnegative real numbers.
- $\sqrt[8]{m^{7}}$

A) $m^{7 / 8}$
B) $\frac{1}{(m n) ^{8}}$
C) $-m^{7 / 8}$
D) $m^{8 / 7}$