Simplify the Radical Expression $\sqrt{m^{7} n^{8}}$ A) $m^{3} n^{4} \sqrt{m}$ B) $m^{3} n^{4}$

Multiple Choice

Simplify the radical expression. Assume all variables represent nonnegative real numbers.
- $\sqrt{m^{7} n^{8}}$

A) $m^{3} n^{4} \sqrt{m}$
B) $m^{3} n^{4}$
C) $m^{4} n^{5}$
D) $m^{3} n^{8} \sqrt{m}$