Use an Identity to Write the Expression as a Single $$\frac { 2 \tan 15 ^ { \circ } } { 1 - \tan ^ { 2 } 15 ^ { \circ } }$$

Use an identity to write the expression as a single trigonometric function or as a single number.
- $$\frac { 2 \tan 15 ^ { \circ } } { 1 - \tan ^ { 2 } 15 ^ { \circ } }$$

A) $\frac { \sqrt { 2 } } { 2 }$

B) $\frac { \sqrt { 2 } } { 4 }$

C) $\sqrt { 3 }$

D) $\frac { \sqrt { 3 } } { 3 }$