​Find the Determinant of the Matrix $$\left[ \begin{array} { c } - \frac { 1 } { 6 } - \frac { 1 } { 6 } \\\\- 1 - \frac { 2 } { 5 }\end{array} \right]$$

Multiple Choice

​Find the determinant of the matrix $$\left[ \begin{array} { c } - \frac { 1 } { 6 } - \frac { 1 } { 6 } \\\\- 1 - \frac { 2 } { 5 }\end{array} \right]$$ . ​

A) ​ $- \frac { 1 } { 8 }$
B) ​ $\frac { 7 } { 30 }$
C) ​ $- \frac { 1 } { 10 }$
D) ​ $- \frac { 1 } { 12 }$
E) ​ $\frac { 7 } { 30 }$