Find the Length of the Minor Axis of the Ellipse $z = \frac { x ^ { 2 } } { 5 } + \frac { y ^ { 2 } } { 25 }$

Multiple Choice

Find the length of the minor axis of the ellipse generated when the surface $z = \frac { x ^ { 2 } } { 5 } + \frac { y ^ { 2 } } { 25 }$ is intersected by the plane $z = 5$

A) 25
B) $10 \sqrt { 10 }$
C) $5 \sqrt { 5 }$
D) 5
E) 10