If x =a- b, y = b- c, z =c- a, then the ...

If `x =a- b, y = b- c, z =c- a,` then the numeric value of the algebric expression `x ^(3) + y ^(3) + z ^(3) - 3 xyz` will be :

A

`a+b+c`

B

`0`

C

`4(a+b+c)`

D

`3abc`

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