Let $$A = \begin{bmatrix}0 & 0 & -1 \\0 & -1 & 0 \\-1 & 0 & 0 \end{bmatrix}$$ The only correct statement about the matrix A is

A

A is a ZERO matrix

B

$$A^2 = I$$

C

$$A^{-1}$$ does not exist

D

A = (-1) I, where I is a Unit matrix