<image>The vertices of a $ 3 - 4 - 5$ right triangle are the centers of three mutually externally tangent circles, as shown. What is the sum of the areas of the three circles?
A. $12\pi$
B. $\frac{25\pi}{2}$
C. $13\pi$
D. $\frac{27\pi}{2}$
E. $14\pi$