Solve the Problem $4 x ^ { 2 } + 25 y ^ { 2 } = 100$

Multiple Choice

Solve the problem.
-Find the volume of the solid generated by revolving the region enclosed by the ellipse $4 x ^ { 2 } + 25 y ^ { 2 } = 100$ about the $x$ -axis.

A) $4 \pi ^ { 2 }$
B) $\frac { 160 \pi } { 3 }$
C) $\frac { 80 \pi } { 3 }$
D) $\frac { 40 \pi } { 3 }$