Let us divide the coefficient matrix into this form: A=D+L+U. Which of these matrices can be L in this equation?

• A. \(\begin{bmatrix}1 & 0 & 0 \\2 & 1 & 0 \\3 & 4 & 1\end{bmatrix}\)
• B. \(\begin{bmatrix}0 & 0 & 0 \\2 & 0 & 0 \\3 & 4 & 0\end{bmatrix}\)
• C. \(\begin{bmatrix}1 & 0 & 0 \\2 & 5 & 0 \\3 & 4 & 6\end{bmatrix}\)
• D. \(\begin{bmatrix}1 & 0 & 0 \\0 & 2 & 0 \\0 & 0 & 3\end{bmatrix}\)