Find the Standard Form of the Equation of the Ellipse $( \pm 2,0 )$

Multiple Choice

Find the standard form of the equation of the ellipse with the given characteristics and center at the origin. ​
Foci: $( \pm 2,0 )$ ;major axis of length 18
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A) $\frac { x ^ { 2 } } { 4 } + \frac { y ^ { 2 } } { 77 } = 1$
B) $\frac { x ^ { 2 } } { 9 } + \frac { y ^ { 2 } } { 2 } = 1$
C) $\frac { x ^ { 2 } } { 81 } - \frac { y ^ { 2 } } { 77 } = 1$
D) $\frac { x ^ { 2 } } { 81 } + \frac { y ^ { 2 } } { 4 } = 1$
E) $\frac { x ^ { 2 } } { 81 } + \frac { y ^ { 2 } } { 77 } = 1$