Find an Equation in Standard Form for the Hyperbola That $( \pm 3,0 )$

Multiple Choice

Find an equation in standard form for the hyperbola that satisfies the given conditions.
-Vertices at $( \pm 3,0 )$ , foci at $( \pm 9,0 )$

A) $\frac { x ^ { 2 } } { 9 } - \frac { y ^ { 2 } } { 81 } = 1$
B) $\frac { x ^ { 2 } } { 72 } - \frac { y ^ { 2 } } { 9 } = 1$
C) $\frac { x ^ { 2 } } { 81 } - \frac { y ^ { 2 } } { 9 } = 1$
D) $\frac { x ^ { 2 } } { 9 } - \frac { y ^ { 2 } } { 72 } = 1$