Find the Volume of the Solid of Revolution Formed by Rotating

Multiple Choice

Find the volume of the solid of revolution formed by rotating the region R about the x-axis.R is the region under the curve $y = \sqrt { 49 - x ^ { 2 } }$ from x = -7 to x = 7.

A) $343 \pi$
B) $\frac { 1,372 } { 3 } \pi$
C) $49 \pi$
D) $\frac { 196 } { 3 } \pi$