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If x^(3) + y^(3) + z^(3) = 3 ( 1 + xyz)...

If ` x^(3) + y^(3) + z^(3) = 3 ( 1 + xyz) , P =- y + z - x , Q = z + x - y and R = x + y - z ` then what is the value of ` P^(3) + Q^(3) + R^(3)- 3PQR` ?

A

9

B

8

C

12

D

6

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