Find the Standard Form of the Equation of the Ellipse $( \pm 3,0 )$

Multiple Choice

Find the standard form of the equation of the ellipse with the following characteristics. ​
Foci: $( \pm 3,0 )$ ,major axis of length: 16
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A) $\frac { x ^ { 2 } } { 64 } + \frac { y ^ { 2 } } { 55 } = 1$
B) $\frac { x ^ { 2 } } { 256 } + \frac { y ^ { 2 } } { 247 } = 1$
C) $\frac { x ^ { 2 } } { 64 } + \frac { y ^ { 2 } } { 9 } = 1$
D) $\frac { x ^ { 2 } } { 256 } + \frac { y ^ { 2 } } { 9 } = 1$
E) $\frac { x ^ { 2 } } { 9 } + \frac { y ^ { 2 } } { 64 } = 1$