If $A = \begin{bmatrix} 2 & 1 & 0 \\ 0 & 2 & 1 \\ 1 & 0 & 2 \end{bmatrix}$,then $|\operatorname{adj} A|$ is equal to

  • A
    $0$
  • B
    $9$
  • C
    $1/9$
  • D
    $81$

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