Let $A = \left( \begin{array} { c c } - 4 & - 9 \\4 & 8\end{array} \right)$

Multiple Choice

Let $A = \left( \begin{array} { c c } - 4 & - 9 \\4 & 8\end{array} \right)$ , and consider the system $X ^ { \prime } = A X$ . The critical point $( 0,0 )$ of the system is a

A) stable node
B) unstable node
C) unstable saddle
D) stable spiral point
E) unstable spiral point