Solve the Problem $y = \cosh x$ , Below by the Curve

Multiple Choice

Solve the problem.
-A region in the first quadrant is bounded above by the curve $y = \cosh x$ , below by the curve $y = \sinh x$ , on the left by the $y$ -axis, and on the right by the line $x = 12$ . Find the volume of the solid generated by revolving the region about the $x$ -axis.

A) 0
B) $\frac { \pi } { 2 } \left( e ^ { - 24 } + 1 \right)$
C) $12 \pi$
D) $2 \pi$