Find the Eccentricity of the Ellipse $$64 x ^ { 2 } + 4 y ^ { 2 } = 256$$

Multiple Choice

Find the eccentricity of the ellipse.
- $$64 x ^ { 2 } + 4 y ^ { 2 } = 256$$

A) $\sqrt { 15 }$
B) $\frac { \sqrt { 15 } } { 8 }$
C) $\frac { \sqrt { 15 } } { 4 }$
D) $\frac { \sqrt { 17 } } { 4 }$