Find the Volume of the Described Solid $x ^ { 2 } + y ^ { 2 } \leq 4$

Multiple Choice

Find the volume of the described solid.
-The base of the solid is the disk $x ^ { 2 } + y ^ { 2 } \leq 4$ . The cross sections by planes perpendicular to the $y$ -axis between $y = - 2$ and $y = 2$ are isosceles right triangles with one leg in the disk.

A) $\frac { 64 } { 3 }$
B) $\frac { 16 } { 3 }$
C) $\frac { 80 } { 3 }$
D) $\frac { 128 } { 3 }$