Solve the Equation for the Unknown $\mathrm { p } ^ { 1 / 3 } = 9$

Solve the equation for the unknown.
- $\mathrm { p } ^ { 1 / 3 } = 9$

A) $p = 27$
B) $\mathrm { p } = \frac { 1 } { 27 }$
C) $\mathrm { p } = \frac { 1 } { 729 }$
D) $p = 729$