Find the Value of the Determinant $\left| \begin{array} { c c } - 8 & - 4 \\ b & \text { a } \end{array} \right|$

Multiple Choice

Find the value of the determinant.
- $\left| \begin{array} { c c } - 8 & - 4 \\ b & \text { a } \end{array} \right|$

A) $8 a - 4 b$
B) $b a - 32$
C) $32 - a b$
D) $- 8 a + 4 b$