What is the value of x^2yz − xyz^2, if x = -1, y = 1, and z = 3?	Choose the correct choice from the following
A) 20  B) 24  C) 30  D) 12  E) 48
1*1*3 -(- 1*1*9)   =3+9= 
<gadget id="calculator">3+9</gadget>
<output>12</output>
12   Ans: 12
<result>D</result>
What is the value of x^2yz − xyz^2, if x = -1, y = 1, and z = 3?