Beginning with a 3\:cm by 3\:cm by 3\:cm cube, a 1\:cm by 1\:cm by 1\:cm cube is cut from one corner and a 2\:cm by 2\:cm by 2\:cm cube is cut from the opposite corner, as shown. In cm^2, what is the surface area of the resulting solid?

**Answer Choices**

A. 42

B. 45

C. 48

D. 51

E. 54