Write the Expression in Exponential Form $\sqrt [ 9 ] { 5 ^ { 11 } }$

Multiple Choice

Write the expression in exponential form. Assume that all variables represent positive real numbers.
- $\sqrt [ 9 ] { 5 ^ { 11 } }$

A) $5 ^ { 11 / 2 }$
B) $5 ^ { 9 }$
C) $5 ^ { 2 / 11 }$
D) $5 ^ { - 11 / 2 }$