\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
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Which of the following is the identity matrix of order 3?
\(\mathbf{A}=\begin{pmatrix}0&0&0 \\0&0&0 \\0&0&0 \end{pmatrix}\)
\(\mathbf{B}=\begin{pmatrix}1&1&1 \\1&1&1 \\1&1&1 \end{pmatrix}\)
\(\mathbf{C}=\begin{pmatrix}1&0&0 \\0&1&0 \\0&0&1 \end{pmatrix}\)
\(\mathbf{D}=\begin{pmatrix}0&0&1 \\0&1&0 \\1&0&0 \end{pmatrix}\)
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