The diagram shown consists of circles with radius 1\:cm and semi-circles with radius 1\:cm. The total shaded area, in cm^2, is

**Answer Choices**

A. 10\pi

B. 9.5\pi

C. 9\pi

D. 8.5\pi

E. 8\pi

The diagram shown consists of circles with radius 1\:cm and semi-circles with radius 1\:cm. The total shaded area, in cm^2, is

**Answer Choices**

A. 10\pi

B. 9.5\pi

C. 9\pi

D. 8.5\pi

E. 8\pi