The graph of the function f(x) = –(x + 3)(x – 1) is shown below.

on a coordinate plane, a parabola opens down. it goes through (negative 3, 0), has a vertex at (negative 1, 4), and goes through (1, 0).

which statement about the function is true?

the function is positive for all real values of x where
x < –1.
the function is negative for all real values of x where
x < –3 and where x > 1.
the function is positive for all real values of x where
x > 0.
the function is negative for all real values of x where
x < –3 or x > –1.