Compute the Determinant of the Matrix by Cofactor Expansion $$\left[ \begin{array} { r r r } 3 & 1 & 2 \\- 3 & - 1 & - 4 \\6 & 5 & 3\end{array} \right]$$

Multiple Choice

Compute the determinant of the matrix by cofactor expansion.
- $$\left[ \begin{array} { r r r } 3 & 1 & 2 \\- 3 & - 1 & - 4 \\6 & 5 & 3\end{array} \right]$$

A) 0
B) $- 9$
C) 18
D) $- 18$