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

Multiple Choice

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

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