Compute the Determinant of the Matrix by Cofactor Expansion $$\left[ \begin{array} { l l l } 4 & 2 & 9 \\5 & 2 & 9 \\7 & 7 & 4\end{array} \right]$$

Multiple Choice

Compute the determinant of the matrix by cofactor expansion.
- $$\left[ \begin{array} { l l l } 4 & 2 & 9 \\5 & 2 & 9 \\7 & 7 & 4\end{array} \right]$$

A) 55
B) 891
C) $- 197$
D) $- 55$