Find the Standard Form of the Equation of the Ellipse $\frac { x ^ { 2 } } { 100 } + \frac { y ^ { 2 } } { 64 } = 1$

Multiple Choice

Find the standard form of the equation of the ellipse satisfying the given conditions.
-Major axis horizontal with length 20; length of minor axis = 16; center (0, 0)

A) $\frac { x ^ { 2 } } { 100 } + \frac { y ^ { 2 } } { 64 } = 1$
B) $\frac { x ^ { 2 } } { 64 } + \frac { y ^ { 2 } } { 100 } = 1$
C) $\frac { x ^ { 2 } } { 20 } + \frac { y ^ { 2 } } { 64 } = 1$
D) $\frac { x ^ { 2 } } { 400 } + \frac { y ^ { 2 } } { 256 } = 1$