The edges of a parallelopiped are of unit length and are parallel to non-coplanar unit vectors $\hat { a } , \hat { b } , \hat { c }$ such that
$$\hat { a } \cdot \hat { b } = \hat { b } \cdot \hat { c } = \hat { c } \cdot \hat { a } = \frac { 1 } { 2 }$$
Then, the volume of the parallelopiped is\\
(A) $\frac { 1 } { \sqrt { 2 } }$\\
(B) $\frac { 1 } { 2 \sqrt { 2 } }$\\
(C) $\frac { \sqrt { 3 } } { 2 }$\\
(D) $\frac { 1 } { \sqrt { 3 } }$