If \( \mathrm{A} \) is a square matrix such that \( \mathrm{AA}^{\m...

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If \( \mathrm{A} \) is a square matrix such that \( \mathrm{AA}^{\mathrm{T}}=\mathrm{I} \) and
\( \mathrm{P} \) \( |\mathrm{A}|=1 \), then \( |\mathrm{A}-\mathrm{I}|= \)

W
(A) 0
(B) 1
(C) -1
(D) none of these
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