The centers of the faces of the right rectangular prism shown below are joined to create an octahedron. What is the volume of the octahedron?

**Answer Choices**

A. \dfrac{75}{12}

B. 10

C. 12

D. 10 \sqrt{2}

E. 15

The centers of the faces of the right rectangular prism shown below are joined to create an octahedron. What is the volume of the octahedron?

**Answer Choices**

A. \dfrac{75}{12}

B. 10

C. 12

D. 10 \sqrt{2}

E. 15