Let M be a 3 × 3 matrix satisfying:\(M\left[ {\begin{array}{*{20}{c}} 0\\ 1\\ 0 \end{array}} \right] = \left[ {\begin{array}{*{20}{c}} { - 1}\\ 2\\ 3 \end{array}} \right],\;M\left[ {\begin{array}{*{20}{c}} 1\\ { - 1}\\ 0 \end{array}} \right] = \left[ {\begin{array}{*{20}{c}} 1\\ 1\\ { - 1} \end{array}} \right],\;and\;M\left[ {\begin{array}{*{20}{c}} 1\\ 1\\ 1 \end{array}} \right] = \left[ {\begin{array}{*{20}{c}} 0\\ 0\\ {12} \end{array}} \right]\)Then the sum of the diagonal entries of M is :

• A. 9
• B. 12
• C. 6
• D. 0