The matrix shown here is : $\begin{bmatrix} 5 & 2 & -3\\2 & 5 & -1\\3 & -1 & 5 \end{bmatrix}$ A. Diagonal B. upper triangular C. symmetric D. square E. skew-symmetric Choose the correct answer from the options given below :

C, D only A, C, D only D only A, D, E only

C, D only