If \( \Delta=\left|\begin{array}{ccc}0 & b-a & c-a \\ a-b & 0 & c-b \\ a-c & b-c & 0\end{array}\....
If \( \Delta=\left|\begin{array}{ccc}0 & b-a & c-a \\ a-b & 0 & c-b \\ a-c & b-c & 0\end{array}\right| \), then \( \Delta \) equals
\( \mathrm{P} \)
(1) \( a+b+c \)
(2) \( -(a+b+c) \)
(3) \( a b c \)
(4) 0
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