Find the Eccentricity $e$ Of the Ellipse $$x ^ { 2 } + 4 y ^ { 2 } = 36$$

Multiple Choice

Find the eccentricity $e$ of the ellipse.
- $$x ^ { 2 } + 4 y ^ { 2 } = 36$$

A) $\sqrt { 5 }$
B) $\frac { \sqrt { 5 } } { 2 }$
C) $\frac { \sqrt { 3 } } { 2 }$
D) $\sqrt { 3 }$