What is the value of x^2yz − xyz^2, if x = − 2, y = 1, and z = 1?	Choose the correct choice from the following.
A) 6  B) 24  C) 30  D) 32  E) 48

Rationale: 4 * 1 * 1 - ( - 2 * 1 * 1 ) = 4 + 2 = 6 ans : a
Answer: A