What is the interval of f(x) = (x 1)(x 2)(x 3)/(x3 + 6x2 + 11x + 6) where f(x) is positive?

What is the interval of f(x) = (x 1)(x 2)(x 3)/(x3 + 6x2 + 11x +

1.	What is the interval of f(x) = (x 1)(x 2)(x 3)/(x³ + 6x² + 11x + 6) where f(x) is positive?
A.	(- , -3) (3, )
B.	(3, -2) (1, 1) (2, 3)
C.	(- , -3) (2, -1) (1, 2) (3, )
D.	(- , )
Answer» D. (- , )