Ononot — If a matrix A is defined as A = \begin{pmatrix} 1 & 2 \\ 3 &

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If a matrix $A$ is defined as $A = \begin{pmatrix} 1 & 2 \\ 3 & 4 \end{pmatrix}$ , which expression represents the sum of the matrix and its transpose, $A + A^T$ ?