Find the Standard-Form Equation for a Hyperbola Which Satisfies the Given

Multiple Choice

Find the standard-form equation for a hyperbola which satisfies the given conditions.
-A hyperbola centered at the origin having vertex at (0, -8) and eccentricity equal to 2

A) $\frac { y ^ { 2 } } { 64 } - \frac { x ^ { 2 } } { 192 } = 1$
B) $\frac { y ^ { 2 } } { 64 } - \frac { x ^ { 2 } } { 64 } = 1$
C) $\frac { y ^ { 2 } } { 64 } + \frac { x ^ { 2 } } { 192 } = 1$
D) $\frac { x ^ { 2 } } { 64 } - \frac { y ^ { 2 } } { 192 } = 1$